Visualizing lone pairs in compounds containing heavier congeners of the carbon and nitrogen group elements

Seshadri, Ram (2001) Visualizing lone pairs in compounds containing heavier congeners of the carbon and nitrogen group elements. In: Proceedings of the Indian Academy of Sciences - Chemical Sciences, 113 (5-6). pp. 487-496.

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Abstract

In this mini-review, I discuss some recent work on the stereochemistry and bonding of lone pairs of electrons in divalent compounds of the heavier carbon group elements (SnII, PbII) and in trivalent compounds of the heavier nitrogen group elements (BiIII). Recently developed methods that permit the real-space visualization of bonding patterns on the basis of density functional calculations of electronic structure, reveal details of the nature of s electron lone pairs in compounds of the heavier main group elements – their stereochemistry and their inertness (or lack thereof). An examination of tetragonal P4/nmm SnO, a-PbO and BiOF, and cubic Fm3m PbS provides a segue into perovskite phases of technological significance, including ferroelectric PbTiO3 and antiferroelectric/piezoelectric PbZrO3, in both of which the lone pairs on Pb atoms play a pivotal rôle.

Item Type:	Journal Article
Publication:	Proceedings of the Indian Academy of Sciences - Chemical Sciences
Publisher:	Indian Academy of Sciences
Additional Information:	Copyright of this article belongs to Indian Academy of Sciences.
Keywords:	Main group elements;lone pairs;stereochemistry; ferroelectricity.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	09 Nov 2011 05:47
Last Modified:	09 Nov 2011 05:47
URI:	http://eprints.iisc.ac.in/id/eprint/40384

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