Transition metal promoted reactions of polyhedral boranes: New synthetic routes to carboranes and ceramic precursors.

Format:

Book

Thesis/Dissertation

Author/Creator:

Mirabelli, Mario G. L.

Contributor:

Sneddon, Larry G., advisor.

University of Pennsylvania.

Language:

English

Subjects (All):

Chemistry, Inorganic.

0488.

Penn dissertations--Chemistry.

Chemistry--Penn dissertations.

Local Subjects:

Penn dissertations--Chemistry.

Chemistry--Penn dissertations.

0488.

Physical Description:

175 pages

Contained In:

Dissertation Abstracts International 50-01B.

System Details:

Mode of access: World Wide Web.

text file

Summary:

Several new transition metal reagents were developed to selectively promote reactions of polyhedral boranes and carboranes with acetylenes. Two classes of reactions that were studied in detail were the acetylene-addition and acetylene-insertion reaction. The acetylene-insertion chemistry employed stoichiometric reagents based on Fe and Ni, while catalytic dehydro alkyne-insertion was observed when either trinuclear or mononuclear ruthenium complexes were utilized. The organometallic complex (Cp*IrCl$\sb2\rbrack\sb2$ was also fund to readily catalyze reactions of boron clusters with acetylenes. This resulted in the formation of a number of alkenylboranes and -carboranes which were subsequently used to prepare a variety of new organoboron and boron-nitrogen polymers. These polymeric vinylboranes and -borazines were then converted to boron carbide and boron nitride ceramics in excellent yield.

Notes:

Thesis (Ph.D. in Chemistry)--Graduate School of Arts and Sciences, University of Pennsylvania, 1988.

Source: Dissertation Abstracts International, Volume: 50-01, Section: B, page: 0175.

Supervisor: Larry G. Sneddon.

Local Notes:

School code: 0175.

Access Restriction:

Restricted for use by site license.