135568-67-1Relevant academic research and scientific papers
Reductive dehalogenation of chloro(alkynyl)phosphines by octacarbonyldicobalt
Lang, Heinrich,Leise, Michael,Zsolnai, Laszlo
, p. 379 - 388 (1991)
Reductive dehalogenation of the (chloro)(phenylethynyl)phosphine (2,4,6-tBu3C6H2O)(PhCC)PCl, I, by Co2(CO)8, II, yields the neutral phosphenium ion complex P=Co(CO)3, III, (R = 2,4,6-tBu3C6H2O; R' = (η2-CCPh)Co2(CO)6), which contains a trigonally planar coordinated phosphorus atom.When NaCo(CO)4, V, is used instead of II a dinuclear complex, Co2(CO)62-P(R)(R')>2, VI, (R = 2,4,6-tBu3C6H2O; R' = CCPh) is formed in which the phosphido ligands P(R)(R'), bridge in a μ2 fashion two Co(CO)3 units.The mechanism of formation of VI, involvinga formal dimerization of two tBu3C6H2O)(PhCC)>P=Co(CO)3 fragments, is discussed.However, (tBu)(PhCC)PCl, VII, reacts with II, to yield the cluster compound VIII, containing the two μ2-bridging units (tBu)2-CCPh)Co2(CO)5>P and (tBu)(PhCC)P.Compounds III and VI-VIII were identified from their analytical and spectroscopic (IR, 1H-, 13C- and 31P-NMR) data.The molecular structure of the cluster compound VIII was determined by an X-ray diffraction study.
