Metal–carbonyl and metal–nitrosyl complexes. Part III. The crystal and molecular structure of cyclopentadienyldinitrosylchromium chloride

Abstract

Cyclopentadienyldinitrosylchromium chloride crystallises in the orthorhombic system, space group P212121, with four molecules of C5H5ClCrN2O2 in a cell of dimensions a= 10·79, b= 12·24, c= 5·95 Å. After Fourier and least-squares refinement of the atomic parameters, the final discrepancy factor is 9·8% over 744 independent reflexions. The cyclopentadienyl ring is randomly distributed over two orientations in the same plane. The Cr–N bonds, of average length 1·711 Å, have considerable double-bond character. The CrNO groupings depart significantly from linearity, with valency angles of 166·4 and 170·8°.