Accession Number : ADA262445


Title :   Structure and Properties of Novel Compounds of Silicon, Germanium and Tin


Descriptive Note : Final rept. 1 Oct 90-30 Sep 92


Corporate Author : COLORADO UNIV AT BOULDER DEPT OF CHEMISTRY AND BIOCHEMISTRY


Personal Author(s) : Michl, Josef


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a262445.pdf


Report Date : 30 Nov 1992


Pagination or Media Count : 8


Abstract : Our work on the organic chemistry of silicon, germanium, and tin containing compounds concentrated on the investigation of novel structures and bonding situations, particularly compounds of multiply bonded and divalent atoms of these elements. In the recent years, our interest gradually gravitated towards an interrogation of the electronic structure and bonding in saturated compounds of these elements, most of all, silicon. We believe that an understanding of this subject will have quite general consequences for the understanding of the nature of delocalized chemical bonding in saturated compounds of all main-group elements. After all, the fact that bonding in saturated compounds is not strictly a matter of entirely localized single bonds is responsible for many theoretically and practically important properties of these compounds: sigma delocalization plays an essential role in phenomena as diverse as charge transfer through 'inert' spacers, propagation of substituent effects, propagation of spin density in saturated radicals, nuclear-nuclear coupling in NMR of saturated molecules, their optical activity, far UV absorption, ionization, etc.


Descriptors :   *SILICON , *TIN , *GERMANIUM , DENSITY , OPTICAL PROPERTIES , NUCLEAR MAGNETIC RESONANCE , CHEMICAL PROPERTIES , MOLECULES , CHEMICAL BONDS , ELECTRONIC STATES , SILANES , ORGANIC COMPOUNDS , IONIZATION , CHARGE TRANSFER , MOLECULAR STRUCTURE , ABSORPTION , INERT MATERIALS , POLYSILANES , CHEMICAL ELEMENTS , SPIN STATES , COUPLINGS , NUCLEAR PROPERTIES , CHEMICAL RADICALS


Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE