Crystal and molecular structure of tricarbonyl-[2,4-diethyl-1,5-bis(di-phenyl)-3-phenyl-1,3,5-triphospha-2,4-diazapentane-PPP]-molybdenum, [Mo(CO)3(Ph2P·NEt·PPh·NEt·PPh2)]

Abstract

Tricarbonyl-[2,4-diethyl-1,5-bis(diphenyl)-3-phenyl-1,3,5-triphospha-2,4-diazapentane-PPP]-molybdenum crystallises in a monoclinic unit cell, space group C_c, of dimensions a= 9·26, b= 20·65, c= 18·54 Å and β= 93·90°, with Z= 4. After Fourier and least-squares refinement of the atomic parameters, the final R value is 0·101 over 3598 visually estimated reflections. The molybdenum atom is approximately octahedrally co-ordinated by three phosphorus atoms of the ligand and three carbonyl groups; the Mo–P distances range from 2·425–2·528 Å and the CO from 1·16–1·20 Å. The P–N bonds average 1·70 ± 0·02 Å, the P–C(aryl) bonds average 1·84 ± 0·02 Å, and the C–C bonds in the phenyl rings average 1·37 ± 0·03 Å.