80339-94-2Relevant academic research and scientific papers
Axially coordinated tetrakis[N-(2,6-dimethylphenyl)acetamido]dimolybdenum(II) compounds. Structures of Mo2[(xylyl)NC(CH3)O]4·2THF and Mo2[(xylyl)NC(CH3)O]4·L (L = NC5H5, NC5H4CH3)
Baral, Subhash,Cotton, F. Albert,Ilsley, William H.,Kaim, Wolfgang
, p. 1644 - 1650 (2008/10/08)
The structures of three axially coordinated tetrakis(xylylacetamido)dimolybdenum(II) compounds are reported (xylyl = 2,6-dimethylphenyl): Mo2[(xylyl)NC(CH3)O]4·2THF (1) and Mo2[(xylyl)NC(CH3)O]4·L (L = NC5H5 (2), NC5H4CH3 (3)). Compound 1 was solved in the orthorhombic space group Pnna with unit cell parameters a = 20.147 (5) A?, b = 48.02 (1) A?, c = 16.485 (4) A?, V = 15949 (11) A?3, and Z = 12. Compound 2 crystallizes in the orthorhombic space group Pccn with unit cell parameters a = 30.414 (6) A?, b = 17.371 (3) A?, c = 18.489 (2) A?, V= 9768 (4) A?3, and Z = 8. Compound 3 was solved in the orthorhombic space group Pbcn with cell parameters a = 15.635 (1) A?, b = 18.272 (1) A?, c = 15.509 (2) A?, V = 4431 (1) A?3, and Z = 4. The crystals of 1 contain molecules on general positions and also on special positions where a twofold axis is collinear with the Mo-Mo bond. The two sorts of molecules are essentially identical, having a transoid (D2d) arrangement of the bridging ligands, Mo-Mo bond lengths of 2.097 (3) and 2.093 (2) A?, and two axially coordinated THF molecules with average Mo-O distances of 2.58 (1) and 2.62 (1) A?. Molecules of 2 and 3 also have the transoid arrangement of bridging ligands with Mo-Mo distances of 2.101 (1) and 2.102 (1) A? and one axially coordinated pyridine (Mo-N = 2.563 (8) A? or 4-picoline (Mo-N = 2.592 (8) A?), respectively.
