Accession Number:

ADA218548

Title:

Investigation of Optical Nonlinearities, Conductivity and Magnetism in Organometallic Materials

Descriptive Note:

Final rept.

Corporate Author:

CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1990-01-25

Pagination or Media Count:

3.0

Abstract:

Substantial progress was made in several key areas of the proposed research. With regard to the production of new materials via the organometallic doping of polydiacetylenes with diorganostannylenes, we have elucidated the steric and electronic factors which govern the reactivity of stannylenes towards alkynes Technical Report No. 1. New classes of cyclic organostannane compounds were produced which include the first examples of stannacyclopropenes and 1,2- distannacyclobut-3-enes. Derivatives of the latter ring system were found to be both air and moisture stable which allows them the be used as important synthetic precursors to new cyclic systems containing tin. Oxidation of a 1,2- distannacyclobutene with iodine was achieved to produce an air and moisture stable tin-centered cationic species. Future work is being performed to produce monomers for ring-open polymerization via olefin metathesis which contain the 1, 2-distannacyclobutene moiety. Upon oxidative doping, new ionic polymers maybe formed. Finally ab initio molecular orbital calculations were performed on the metallacyclopropenes of silicon, germanium, and tin and this information supports the model of reactivity and stability that was formulated for alkynes and stannylenes. Keywords Organic chemistry Metal compounds Tin compounds Organostannane Optical data Conductivity Magnetic properties.

Subject Categories:

  • Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE