Journal of the Chemical Society, Dalton Transactions p. 4265 - 4268 (1996)
Update date:2022-08-29
Topics:
Clark, George R.
Nielson, Alastair J.
Rickard, Clifton E. F.
Reaction of 2,4,6-triphenylaniline with Na2MoO4 in the presence of SiMe3Cl and NEt3 in 1,2-dimethoxyethane (dme) gave the oxoimido complex [MoCl2(NC6H2Ph3-2,4,6)O(dme)]. Its crystal structure determination showed a distorted octahedron with mutually cis-oxo and imido groups, trans-chloride ligands and the dme oxygen atoms trans to the oxide and imide ligands. The Mo-Nimido and Mo-Ooxo bond lengths [1.756(7) and 1.700(6) A] are consistent with four- and two-electron donor ligands, respectively. The phenyl ring of the imide ligand orientates with the face of one ortho substituent phenyl ring pushing away from a chloride ligand and tilted towards the oxide ligand. The second such phenyl ring tilts away from a chloride ligand but does not push away from the side of the molecule. This occurs as the imido group bends towards the other side of the molecule [Mo-N-C 172.2(7)°] and a methyl group of the dme ligand is severely distorted to remove an interaction with the phenyl ring.
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