S. Ito et M. Yoshifuji, Preparation of carbonyltungsten(0) complexes of 2-chloro-3,3-diphenyl-1-(2,4,6-tri-tert-butylphenyl)-1,3-diphosphapropene, CHEM COMMUN, (13), 2001, pp. 1208-1209
(Z)-2-Chloro-3,3-diphenyl-1-(2,4,6-tri-tert-butylphenyl)-1,3-diphosphaprope
ne was prepared from chlorodiphenylphosphine and 1-chloro-2-(2,4,6-tri-tert
-butylphenyl)-2-phosphaethenyllithium and used for metal complex formation
as a ligand to provide carbonyltungsten(0) complexes.