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1.  Last Presentation  Demystifying chemical bonding, chemical kinetics and catalysis

By Gankin, Yuriy V.; Gankin, Victor Y.

From Abstracts of Papers, 240th ACS National Meeting, Boston, MA, United States, August 22, 2010,  Language: English

 According to J.N. Spencer (JCE No. 3 p.182
1991) base of quantum-chemical interpretations are 'unteachable'. We have
developed the phenomenological (data-driven) "teachable" approach for
explaining the main phenomena of chemical bonding and chemical reactions.
Experimental facts  in detail>>          

2. Explanation of a difference between covalent radii in H2 and in heteroatomic hydrogen containing compounds

By Gankin, Yuriy V.; Gankin, Victor Y.

From Abstracts of Papers, 239th ACS National Meeting, San Francisco, CA, United States, March 21-25, 2010 (2010), CHED-1625. Language: English, Database: CAPLUS

In all known compds. where atoms are connected by a covalent bond, the length of a covalent radius of a given atom is close to its covalent radius in a diat. mol.  Hydrogen has been the only known exception to this rule.  Its covalent radii in all studied compds. (e.g., HF, HCL, H2O, H2S, H2Se, PH3) is in 0.28-0.32Å range.  At the same time the conventionally accepted exptl. value of the covalent radius of hydrogen is 0.3707Å.  This relatively large difference has been considered as controversial for over 70 years.  According to our calcns., the covalent radius of hydrogen is 0.291 Å which is ...

3. Glass transition temperature: problems of measurement procedures

By Mazurin, O. V.; Gankin, Yu. V.

From Glass Technology: European Journal of Glass Science and Technology, Part A (2008), 49(5), 229-233. Language: English, Database: CAPLUS

A review.  Glass transition temp., Tg, is currently studied much more intensively than any other glass property.  However, the efficient use of exptl. values of Tx will be possible only if authors of papers follow a few std. rules of exptl. procedure and data presentation.  An important problem with the correlation between Tg and viscosity values of glasses is also discussed.

4. Chemical kinetics and catalysis

By Fabrikant, Alexander; Gankin, Victor; Gankin, Yuriy; Shmulevich, Isabel S.

From Abstracts of Papers, 236th ACS National Meeting, Philadelphia, PA, United States, August 17-21, 2008 (2008), CHED-100. Language: English, Database: CAPLUS

The main question concerning chem. reactions is: Why is it that reactions proceed with the breaking of the chem. bond at normal temps., while we need a temp. of more than 4,000 degrees C to break such bonds thermally.  We have managed to prove that the interactions between mols. take place mainly along the chain reaction scheme where the intermediate active particles are radicals, ions, etc.  We managed to realize why radicals, ions, etc. are chem. active.  A catalyst is a chem. compd. that forms a greater no. of active species in the system than initial mols. do at the same temp.  The second ...

5. Physical sense of periodic law

By Gankin, Victor; Gankin, Yuriy; Fabricant, S.; Shmulevich, Isabel S.

From Abstracts of Papers, 236th ACS National Meeting, Philadelphia, PA, United States, August 17-21, 2008 (2008), CHED-073. Language: English, Database: CAPLUS

In the framework of traditional (classic) development of chem. the extension of the understanding of the Periodic Law was completed by Moseley's work.  After the discovery made by Moseley the principle forces of the scientific community were directed to the confirmation of the existence of the Periodic Law.  In the course of these studies it was proved that with growing nucleus charge the first ionization energy and the no. of electrons in the outer shell of the atom varied periodically.  To elucidate the phys. sense of the Periodic Law we selected these two characteristics of the atom varying...

6. Alternative introductory chemistry curriculula (report 2)

By Shmulevich, Isabel S.; Fabrikant, Alexander; Segal, Michael D.; Gankin, Victor; Gankin, Yuriy

From Abstracts of Papers, 236th ACS National Meeting, Philadelphia, PA, United States, August 17-21, 2008 (2008), CHED-072. Language: English, Database: CAPLUS

The main difficulty in teaching chem. lies in the interpretation of chem. phenomena on the basis of quantum chem. where teachers have to explain things that they don't understand themselves.  The widely used quantum chem. explanations include paradigms and principles whose phys. bases are not clear.  The Lewis Rules that are also widely used to explain chem. bonding phenomena at introductory levels have unclear phys. reasoning and many exceptions.  According to S.Lippard, as a result of the recent revolutionary changes in chem., older paradigms are giving way to new principles.  We have develo...

7. Alternative introductory chemistry curriculum (www.itchem.com)

By Shmulevich, Isabel S.; Fabrikant, Alexander; Gankin, Victor; Gankin, Yuriy

From Abstracts of Papers, 236th ACS National Meeting, Philadelphia, PA, United States, August 17-21, 2008 (2008), CHED-071. Language: English, Database: CAPLUS

In 1989 the Division of Chem. Education of ACS recognized the need to foster the development of alternative introductory chem. curricula.  One of the main shortcomings of the existing textbooks is the quantum-chem. explanation of chem. phenomena that are -unteachable', breaking the golden rule of teaching.  Our report will include an alternative variant of introductory chem. curricula where the main chem. phenomena (chem. bonds and chem. reactions) are explained in the framework of the classical phenomenol. approach that was successfully used in chem. in the period preceding the introduction o...

8. Physical sense in chemical laws and rules

By Gankin, Yuri V.; Gankin, Victor

From Abstracts of Papers, 235th ACS National Meeting, New Orleans, LA, United States, April 6-10, 2008 (2008), CHED-1592. Language: English, Database: CAPLUS

Periodic Law, Lewis rules and resonance theory provided a possibility to systematize the elements, various chem. bonds, to draw in most cases the structural formulas of substances and to predict by analogy their phys. and chem. characteristics.  The next in order was the problem of the phys. nature (mechanism) of the main chem. phenomena: chem. bond, chem. reactions and catalysis, and also all above mentioned laws and rules.  Starting from nineteen thirties the traditional course of the chem. science was replaced by quantum-mech. one which as we had shown already in 1980 basically was not capa...

9. Chemical sense of a series of physical laws

By Gankin, Yuri V.; Gankin, Victor

From Abstracts of Papers, 235th ACS National Meeting, New Orleans, LA, United States, April 6-10, 2008 (2008), CHED-1591. Language: English, Database: CAPLUS

According to the studies reported above the laws and rules are intermediate stages in science and not fundamental initial entity concepts.  The main immediate problem after the discovery of a law is the elucidation of the mechanism how this law operates.  The anal. of the main phys. laws showed that no mechanism was suggested for all laws involving mass as an initial entity.  During the time after the discovery of these laws it was proved that all material bodies are composed of charged particles and do not contain mass (neutral and nonstructural matter).  The discovery of induction phenomenon...

10. Theory of metallic bonding

By Gankin, Yuriy; Gankin, Victor

From Abstracts of Papers, 234th ACS National Meeting, Boston, MA, United States, August 19-23, 2007 (2007), CHED-508. Language: English, Database: CAPLUS

According to J.N. Spencer (JCE No. 3 p.182 1991) base of quantum-chem. interpretations are -unteachable'.  We have developed an approach that helps explaining major chem. phenomena (covalent bonding, chem. kinetics and catalysis) without introducing quantum chem. entities.  Our approach and a General Chem. text book synopsis utilizing it are presented at www.ITChem.com.  Based on that approach we have developed a theory of metallic bonding and explained the differences between bonds in metals and non-metallic compds.  While atoms of non-metals are connected via static two-electron covalent bon...

11. Theory of electrical conductivity

By Gankin, Yuriy; Gankin, Victor

From Abstracts of Papers, 234th ACS National Meeting, Boston, MA, United States, August 19-23, 2007 (2007), CHED-507. Language: English, Database: CAPLUS

We have developed system of explaining major chem. and phys. phenomena without introducing quantum chem. entities.  Based on that approach we have developed an explanation of elec. cond. in metals.  Conventionally, a solid metal is described as a 3D lattice with partially ionized atoms in the nodes.  Electrons sepd. from the atoms move freely in all directions ("electron gas", "pos. ions in a sea of electrons").  When voltage is applied, free electrons move in the direction of the field propagation.  That notion contradicts the modern knowledge that electrons in metals are str...

12. On effective use of existing experimental data in glass science

By Mazurin, O. V.; Gankin, Yu.

From Physics and Chemistry of Glasses: European Journal of Glass Science and Technology, Part B (2006), 47(6), 627-630. Language: English, Database: CAPLUS

Two large glass property databases have been on the market for nearly ten years.  Nevertheless, even now their use by specialists in glass science and technol. is surprisingly limited.  In this communication we try to demonstrate the importance of using such databases in the course of exptl. work, selecting a recent publication in Physics and Chem. of Glasses as an example.

13. Phenomenological explanation of metallic bonding and electrical conductivity

By Gankin, Yuriy; Gankin, Victor

From Abstracts of Papers, 233rd ACS National Meeting, Chicago, IL, United States, March 25-29, 2007 (2007), CHED-1773. Language: English, Database: CAPLUS

The widely used quantum chem. explanations include paradigms and principles whose phys. bases are unclear.  We have developed an approach that helps explaining major chem. phenomena (covalent bonding, chem. kinetics and catalysis) without introducing quantum chem. entities.  Our approach and a General Chem. text book synopsis utilizing it are presented at www.ITChem.com.  Based on that approach we have developed a phenomenol. explanation of nature of metallic bonding and elec. cond. that explained the differences between bonds in metals and non-metallic compds.  While atoms of non-metals are c...

14. Phenomenological explanation of metallic bonding

By Gankin, Yuriy; Gankin, Victor Y.

From Abstracts of Papers, 232nd ACS National Meeting, San Francisco, CA, United States, Sept. 10-14, 2006 (2006), CHED-507. Language: English, Database: CAPLUS

The widely used quantum chem. explanations include paradigms and principles whose phys. bases are unclear.  According to J.N. Spencer (JCE No. 3 p.182 1991) base of quantum-chem. interpretations are -unteachable'.  We have developed an approach that helps explaining major chem. phenomena (covalent bonding, chem. kinetics and catalysis) without introducing quantum chem. entities.  Our approach and a General Chem. text book synopsis utilizing it are presented at www.ITChem.com.  Based on that approach we have developed a phenomenol. explanation of nature of metallic bonding and explained the dif...

15. Semi-quantitative modeling of electrical conductivity in metals and non-metals

By Gankin, Yuriy; Gankin, Victor Y.; Sanin, Aleksandr

From Abstracts of Papers, 232nd ACS National Meeting, San Francisco, CA, United States, Sept. 10-14, 2006 (2006), CHED-506. Language: English, Database: CAPLUS

Previously we have developed a phenomenol. (non quantum chem.) approach (www.ITChem.com) that explained the differences between bonding in solid metals and non-metals.  We have shown that atoms in solid non-metals are connected via static two-electron covalent bonds while atoms in solid metals are linked by dynamic one-electron bonds.  We have also presented quant. explanations of how that bonding difference dets. dissimilarity between properties (primarily thermo and elec. cond.) of metals and non-metals and a math. model describing covalent bonding.  Based on those findings, in this report w...

16. Phenomenological explanation of electrical conductivity

By Gankin, Yuriy; Gankin, Victor

From Abstracts of Papers, 232nd ACS National Meeting, San Francisco, CA, United States, Sept. 10-14, 2006 (2006), CHED-504. Language: English, Database: CAPLUS

The widely used quantum chem. explanations include paradigms and principles whose phys. bases are unclear and -unteachable'.  We have developed system of explaining major chem. phenomena without introducing quantum chem. entities (www.ITChem.com).  Based on that approach we have developed an explanation of elec. cond. in metals.  Conventionally, a solid metal is described as a 3D lattice with partially ionized atoms in the nodes.  Electrons sepd. from the atoms move freely in all directions ("electron gas", "pos. ions in a sea of electrons").  When voltage is applied, free electrons move in th...

17. Paradigm shift in explanation of chemical kinetics and catalysis

By Gankin, Yuriy V.; Gankin, Victor

From Abstracts of Papers, 230th ACS National Meeting, Washington, DC, United States, Aug. 28-Sept. 1, 2005 (2005), CHED-392. Language: English, Database: CAPLUS

Exptl. facts that have been collected over the last fifty years lead to change in paradigms of chem. kinetics and catalysis.  Meanwhile, chem. education is still largely based upon a combination of obsolete (and in many cases phys. unclear principles) and description of modern exptl. facts and observations.  The Transition State (TS) Theory broadly employed to explain chem. reaction and catalysis phenomena provides a mechanistic (non-chem.) description and involves and incomprehensible TS entity.  We have developed an alternative approach to describing chem. kinetics and catalysis based the ne...

18. Phenomenological explanation of chemical kinetics and catalysis in introductory college chemistry

By Gankin, Yuriy V.; Gankin, Victor

From Abstracts of Papers, 230th ACS National Meeting, Washington, DC, United States, Aug. 28-Sept. 1, 2005 (2005), CHED-389. Language: English, Database: CAPLUS

The main difficulty in teaching chem. lies in the interpretation of chem. phenomena on the basis of quantum chem. where teachers have to explain things that they often do not understand themselves.  The widely used quantum chem. explanations include paradigms and principles whose phys. bases are not clear.  Transition State Theory broadly employed to explain chem. reaction and catalysis phenomena at introductory level provide a mechanistic ("non-chem.") description and involves an incomprehensible transition state entity.  We have developed an alternative approach to describing chem. reaction ...

19. Phenomenological explanation of chemical bonding phenomena in introductory college chemistry

By Gankin, Yuriy V.; Gankin, Victor

From Abstracts of Papers, 230th ACS National Meeting, Washington, DC, United States, Aug. 28-Sept. 1, 2005 (2005), CHED-387. Language: English, Database: CAPLUS

The main difficulty in teaching chem. lies in the interpretation of chem. phenomena on the basis of quantum chem. where teachers have to explain things that they often do not understand themselves.  The widely used quantum chem. explanations include paradigms and principles whose phys. bases are not clear.  The Lewis Rules that are also widely used to explain chem. bonding phenomena at introductory levels have unclear phys. reasoning and many exceptions.  We have developed an alternative approach to describing and modeling the major characteristics of chem. bonding (such as energy, length, and...

20. Quantum-chemical vs. phenomenological explanations in introductory chemistry

By Gankin, Yuriy V.; Gankin, Victor

From Abstracts of Papers, 229th ACS National Meeting, San Diego, CA, United States, March 13-17, 2005 (2005), CHED-1447. Language: English, Database: CAPLUS

The Division of Chem. Education of ACS has long recognized the need to foster the development of alternative introductory chem. curricula.  One of the shortcomings of the traditional textbooks, according to J. Spencer, (JCE No. 3, 1991) is that quantum-chem. explanations of chem. phenomena are  unteachable'.  In previous reports we have suggested an alternative phenomenol. system for explaining the main chem. phenomena (see www.ITChem.com) which does not include quantum chem., and which makes it perfectly teachable.  Our report will include a comparison of the two explanatory systems relative ...

21. Paradigm shift in explanation of chemical kinetics and catalysis (www.itchem.com)

By Gankin, Yuriy V.; Gankin, Victor

From Abstracts of Papers, 229th ACS National Meeting, San Diego, CA, United States, March 13-17, 2005 (2005), CHED-1446. Language: English, Database: CAPLUS

In 1968 Lotar Mayer announced: "Chem. phenomena must be treated as if they were problems of mechanics".  This announcement serves as an epigraph to the chapter Rates and Mechanisms of Chem. Reactions issued by Chem. Principles in 1979.  In textbooks issued at the beginning of the XXI century, there are visual aids for students illustrating drawings where the interacting mols. approach each other at a great speed, then they collide and break up.  Exptl. facts that have been collected over the last fifty years lead to change in paradigms of chem. kinetics and catalysis.  According to the new par...

22. About testing the reliability of glass property data in binary systems

By Mazurin, O. V.; Gankin, Yu.

From Journal of Non-Crystalline Solids (2004), 342(1-3), 166-169. Language: English, Database: CAPLUS

Reliability of the exptl. data given in the publications concerning properties of glasses and melts is an important characteristic of such publications.  Unfortunately, in the last decades there is an obvious tendency of increasing the percentage of publications contg. gross errors in exptl. data.  In the present paper the ways to oppose this tendency by using glass property databases are described.

23. Paradigm shift in explanation of chemical kinetics and catalysis

By Gankin, Yuriy V.; Gankin, Victor

From Abstracts of Papers, 228th ACS National Meeting, Philadelphia, PA, United States, August 22-26, 2004 (2004), CHED-301. Language: English, Database: CAPLUS

In 1968 Lotar Mayer announced: "Chem. phenomena must be treated as if they were problems of mechanics." This announcement serves as an epigraph to the chapter Rates and Mechanisms of Chem. Reactions issued by Chem. Principles in 1979.  In textbooks issued at the beginning of the XXI century, there are visual aids for students illustrating drawings where the interacting mols. approach each other at a great speed, then they collide and break up.  Exptl. facts that have been collected over the last fifty years lead to change in paradigms of chem. kinetics and catalysis.  According to the new para...

24. Data-driven model for explaining the structure and properties of anomalous compounds

By Gankin, Victor; Gankin, Yuriy V.

From Abstracts of Papers, 228th ACS National Meeting, Philadelphia, PA, United States, August 22-26, 2004 (2004), CHED-234. Language: English, Database: CAPLUS

In textbooks and monographs quantum-chem. interpretations are indispensable when explaining the properties of compds. NO2, SO2, C6H6, SF6, PF5, I3, HF2-, etc.  The equality of the bond lengths in the first 3 is explained by the super-position of the structures, the expansion of the Lewis Rules in SF6 and PF5, by the participation of the 3d orbitals.  The equality of the bonds in I3- and HF2- is explained in the framework of the MO theory.  The properties and the structure of these compds. are explained in the report by the fact that in all these cases the central atom is bonded to identical at...

25. Phenomenological (data-driven) interpretation of chemical bonding in the framework of introductory chemistry

By Gankin, Yuriy V.; Gankin, Victor

From Abstracts of Papers, 228th ACS National Meeting, Philadelphia, PA, United States, August 22-26, 2004 (2004), CHED-228. Language: English, Database: CAPLUS

According to J. Spencer (JCE. #3, 1991) quantum-chem. explanations of chem. phenomena, being the basic explanatory system in textbooks during the last 50 yr, are unteachable.  In 1994 a textbook was issued: Atoms, Mols., and Reactions where the authors Gillespie, Eaton, Humphrey, and Robinson introduced electronic configurations by way of at. ionization energies rather than in terms of quantum nos., for which no exptl. or theor. justification can be given at the introductory level.  That is, they have shown that the change of the canonized explanatory system is possible.  For the last 20 yr, w...

26. Paradigm shift in explanation of chemical kinetics and catalisis (www.itchem.com)

By Gankin, Yuriy; Gankin, Victor

From Abstracts of Papers, 227th ACS National Meeting, Anaheim, CA, United States, March 28-April 1, 2004 (2004), CHED-1160. Language: English, Database: CAPLUS

Exptl. facts that have been collected over the last fifty years lead to change in paradigms of chem. kinetics and catalysis.  Meanwhile, chem. education is still largely based upon a combination of obsolete (and in many cases phys. unclear principles) and description of modern exptl. facts and observations.  The Transition State (TS) Theory broadly employed to explain chem. reaction and catalysis phenomena provides a mechanistic (non-chem.) description and involves and incomprehensible TS entity.  We have developed an alternative approach to describing chem. kinetics and catalysis based the ne...

27. Teachable explanation of the chemical bonding

By Gankin, Yuriy V.; Gankin, Victor

From Abstracts of Papers, 227th ACS National Meeting, Anaheim, CA, United States, March 28-April 1, 2004 (2004), CHED-1134. Language: English, Database: CAPLUS

The main difficulty in teaching chem. lies in the explanation of chem. phenomena on the basis of quantum chem. when the teachers have to explain things that they hardly understand themselves.  According to J.N. Spencer (JCE No. 3 1991) the basis of quantum-chem. interpretations are "unteachablea".  According to S. Lippard (C&EN, Aug. 7,2000), "as a result of the recent revolutionary changes in chem., older paradigms are giving way to new principles".  The paradigm to the effect that the problem of chem. bonding can be solved only in the framework of quantum mechanics, was exchanged for a parad...