The Slow Isomerization of 2-(CF3SPCF3)B5H8; Other New Phosphinopentaboranes.

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Abstract:

Four new phosphinopentaborane 9 compounds have been made. The new reaction 4CF3S2 CF3P4 yielding 4CF3S2PCF3 quantitative at 200C. provided the new compound CF3S2PCF3 for reaction with LiB5H8 to make 2-CF3SPCF3B5H8. This isomerized slowly at 25C. to 1-CF3SPCF3B5H8. With more strongly basic phosphine units, P-bridging of the 2 and 3 B atoms was retained the new compound 2,3-mu-C6H52PB5H8 showed an atypical 2,3-BH NMR doublet with B-P coupling evidently too small to be resolved whereas 2,3-mu-CH3PClB5H8 showed the pseudo-triplet typical of the 2,3-B signal of other 2,3-mu-R2PB5H8 compounds. This methylchloro-phosphinopentaborane proved to be unstable at 25C., converting slowly to resinous material. Author

Author(s):
Mishra, Indu B. ; Burg, Anton B.
Author Organization(s):
UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF CHEMISTRY
Descriptive Note:
Technical rept.,
Pagination:
0010

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-5
Contract/Grant Number(s):
N00014-67-A-0269-0003
Project Number(s):
NR-053 050
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*BORANES, *PHOSPHINE, SYNTHESIS(CHEMISTRY), CHEMICAL REACTIONS, SULFIDES, CHEMICAL BONDS, NUCLEAR MAGNETIC RESONANCE, FLUORINE COMPOUNDS, HALOGENATED HYDROCARBONS, INFRARED SPECTRA
Field(s)/Group(s):
Inorganic Chemistry, Organic Chemistry
Keyword(s):
*ISOMERIZATION
Report Date:
1971 Jul 01