Accession Number:

ADA235515

Title:

Reduction of C Bonds Proceeds with Retention of Configuration: Stereochemical Investigation of the Heterogeneous Reduction by Dideuterium of (Homohypostrophene)Neopentyl(2-Norbornyl)Platinum(II) Complexes on Platinum Black.

Descriptive Note:

Technical rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CHEMISTRY

Personal Author(s):

• Lee, T. R.
• Wierda, Derk A.
• Whitesides, George M.

Report Date:

1991-04-23

Pagination or Media Count:

107.0

Abstract:

This paper reports an investigation of the heterogeneous, platinum 0-catalyzed reductions by dideuterium of homohypostropheneneopentylexo-2- norbornylplatinumII and Homohypostropheneneopentylendo-2-norbornyl platinumII. The stereochemistries of bonding of the norbornyl groups to platinum are rigorously defined by crystal structures. The reductions occur on the surface of the catalyst the organic ligands are converted to alkanes via reaction of surface alkyls with surface deuterides D the platinum atom in the organometallic complex is reduced to platinum0, and becomes part of the surface of the catalyst. Reduction incorporates deuterium into the exo-2 position of norbornane analogous reduction of 2 incorporates deuterium predominantly into the endo-2 position of norbornane. These results provide the most direct evidence now available that the stereochemistry of the reduction of C bonds by H D proceeds with retention of configuration.

Descriptors:

• *ORGANOMETALLIC COMPOUNDS
• *DEUTERIUM
• *BONDING
• ALKANES
• REDUCTION
• SURFACES
• CONFIGURATIONS
• RETENTION(GENERAL)
• LIGANDS
• CATALYSTS
• PLATINUM
• STEREOCHEMISTRY
• ATOMS
• BLACK(COLOR)
• CONVERSION
• CRYSTAL STRUCTURE

Subject Categories:

• Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE