Reactions of activated quadruply bonded molybdenum dimers. Formation of new rectangular clusters containing the tetrametal analogue of cyclobutadiyne
A new quadruply bonded molybdenum dimer, Mo/sub 2/Cl/sub 4/(P(C/sub 6/H/sub 5/)/sub 3/)/sub 2/(CH/sub 3/OH)/sub 2/, has been prepared, characterized by structure analysis, and shown to exhibit unusual reactivity. In benzene solution the new dimer undergoes self-addition across the quadruple bond resulting in formation of a novel tetrameric cluster unit. Structure determination of the triethylphosphine substituted tetramer, Mo/sub 4/Cl/sub 8/(PEt/sub 3/)/sub 4/, revealed the molecular, rectangular cluster unit with two short Mo--Mo bonds, 2.211(3) A, and two long bonds, 2.901(2) A. The short Mo--Mo bonds are unsupported by bridging ligands but the long bonds are each bridged by two Cl atoms, and the coordination sphere of each Mo is completed by one Cl and one PEt/sub 3/ terminal ligand. The Mo--Mo bond distances, diamagnetism, and number of electrons available for bonding are consistent with assessment of bonding in the rectangle as two triple and two single bonds, the tetrametal analogue of cyclobutadiyne. 2 figures.
- Research Organization:
- Iowa State Univ., Ames
- OSTI ID:
- 6426089
- Journal Information:
- J. Am. Chem. Soc.; (United States), Journal Name: J. Am. Chem. Soc.; (United States) Vol. 100:25; ISSN JACSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
AROMATICS
BENZENE
BOND LENGTHS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COMPLEXES
DIAMAGNETISM
DIMERS
DISSOLUTION
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
HYDROCARBONS
LEPTONS
LIGANDS
MAGNETISM
MOLECULAR STRUCTURE
MOLYBDENUM COMPLEXES
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
POLYMERS
SOLVENTS
STRUCTURAL CHEMICAL ANALYSIS
TRANSITION ELEMENT COMPLEXES
VALENCE
YIELDS