Bis[bis-(diphenyl-phosphino-yl)acetonitrile-?O,O']copper(II).

ABSTRACT: The title complex, [Cu(C(26)H(20)NO(2)P(2))(2)], contains a central Cu(II) atom surrounded by two homoleptic bidentate ligands, which form two five-membered chelate rings. The Cu atom binds to four O atoms, resulting in a four-coordinate square-planar complex. The asymmetric unit contains half of the complex, the other half being completed by inversion symmetry. The Cu-O bond lengths have similar distances, viz. 1.9153?(10)?Å for the pair opposite (trans) each other and 1.9373?(10)?Å for the other (trans) pair. The P-O bond lengths are 1.5250?(11)?Å, indicating significant electron delocalization across the O-P-C-P-O atoms in the chelate ring, resulting in a longer P-O bond length when compared to a formal double-bond P=O character (much shorter at approximately 1.47?Å). The two inter-secting O-Cu-O angles are both linear at 180°, whilst the remaining L-shaped O-Cu-O bond angles are 88.26?(5) and 91.74?(5)°. The C-C N fragment is slightly distorted from linearity at 177.44?(19)° and the C N bond length of 1.151?(2)?Å indicates predominantly triple-bond character.

SUBMITTER: Sithole SV 

PROVIDER: S-EPMC3200899 | biostudies-other | 2011 Sep

REPOSITORIES: biostudies-other