Borohydride B-H activation and dimerization by a doubly bonded, early-transition-metal organodimetallic complex. Ditantalladiborane syntheses as models for dehydrodimerization of methane to ethene

Journal Article · Wed Apr 26 04:00:00 EDT 1989 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00191a063· OSTI ID:5051114

Ting, Ching; Messerle, L ^[1]

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1. Univ. of Iowa, Iowa City (USA)

There is considerable interest in hydrocarbon C-H activation from the theoretical and organometallic perspectives, particularly in discovering activation/functionalization pathways and bonding models for catalyst surface intermediates. The isoelectronic relationships between hydrocarbons and boranes have led to studies of metallaboranes as hydrocarbon-metal analogues, for example, distorted BH{sub 4}{sup {minus}} complexes are models for CH{sub 4} coordination in the transition state for C-H activation. Their discovery of vinylic C-H activation by the Ta{double bond}Ta complexes (C{sub 5}Me{sub 4}R){sub 2}Ta{sub 2}({mu}-X){sub 4} led them to examine reactivity toward B-H bonds. The reactions of BH{sub 4}{sup {minus}} with multiply bonded M-M compounds are unstudied, particularly for the early transition metals, hydroboration of M-C multiple bonds, but not M-M multiple bonds, has been reported. They wish to report new complexes with hexahydridodiborate (diborane(2-), unknown as a free species) ligands derived from BH{sub 4}{sup {minus}} B-H activation and dehydrodimerization by a M{double bond}M group.

• DOE Contract Number: FG22-85PC80513
• OSTI ID: 5051114
• Journal Information: Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 111:9; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKANES
BORANES
BORON COMPOUNDS
CHEMICAL BONDS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DATA
DIMERIZATION
DOUBLE BONDS
ETHANE
EXPERIMENTAL DATA
FUNCTIONAL MODELS
HYDROCARBONS
INFORMATION
LIGANDS
METHANE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
POLYMERIZATION
REFRACTORY METAL COMPOUNDS
SYNTHESIS
TANTALUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS