CHEMISTRY EDUCATION: RESEARCH AND PRACTICE IN EUROPE 2001, Vol. 2, No. 2, pp. 67-72	INVITED THEME ISSUE: Structural concepts Contribution from science

Peter G. NELSON
University of Hull, Department of Chemistry

MODIFIED LEWIS THEORY PART 1. POLAR COVALENT BONDS AND HYPERVALENCY

ABSTRACT: A modification to Lewis's theory of valency is proposed to make it more consistent with the results of quantum-mechanical calculations on molecules containing polar covalent bonds (e.g., ClF) and hypervalent atoms (e.g., SF₆). A distinction is drawn between the valence shell of an atom (VS) and the Lewis shell (LS). [Chem. Educ. Res. Pract. Eur.: 2001, 2, 67-72]

KEY WORDS: Lewis theory; polar covalent bond; hypervalency; valence shell; Lewis shell

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