Metal complexes of new chiral tridentate ligands with N, P and S donors: The crystal structure of W(CO)3

Article abstract of DOI:10.1016/0022-328X(94)80047-2

Two new ligands, (S)-Ph2POCH2CH(NMe2)CH2CH2SCH3, derived from L-methionine, and (R)-Ph2POCH2CH(NMe2)CH2SCH3 from L-cysteine have been prepared and characterized.Several metal complexes of Pd, Mo and W have been prepared.These ligands produce a chiral electronically asymmetric environment at the metal that is evidenced by trans influences on the other ligands.A crystal structure has been determined for <(S)-Ph2POCH2CH(NMe2)CH2CH2SCH3>W(CO)3.The sulfur adopts an S_s configuration in the solid and significant trans influences are observed in the metrical parameters of the carbonyls.This tungsten complex crystallizes in the monoclinic space group P2₁ with a=8.8435(6) Angstroem, b=14.384(1) Angstroem, c=9.546(1) Angstroem, β=107.051(8), Z=2 and V=1161.0(4) Angstroem³.Key words: Tungsten; Molybdenum; Palladium; Chirality; X-ray diffraction; Carbonyl