Synthesis and Co - ordination Chemistry of a New Tripodal Phosphine Alcohol t
نویسندگان
چکیده
The tripodal phosphine alcohol CH,C(CH,PPh,),(CH,OH) (dpmp) was prepared and its co-ordination chemistry towards Group 6 metal carbonyls and a manganese(1) complex studied. In [M(CO),(dpmp-P,P')] (M = Cr, M o or W), the tripodal ligand behaves as a bidentate ligand with the hydroxyl site unco-ordinated. Reaction of dpmp with [Mn(CO),Br] gave a stereoisomeric mixture of products, anti,fac[Mn(CO),Br(dpmp-P,P')] 4a and syn,fac-[Mn(CO),Br(dpmp-P,P')] 4b. Treatment of 4a or 4b with silver hexafluorophosphate yielded a facial complex fac-[Mn(CO),(dpmp-P,P',O)] PF, 6. Complex 6 reacted with the anions X(X = Br, 1, N, or SCN) stereospecifically to give syn,fac[Mn(CO),X(dpmp-P,P')] (X = Br 4b. I 5b. N, 8b or NCS 9b). X-Ray crystal structures of complexes 4b. 6 and 9b were determined. The crystal structure of complex 9b is the first of a manganese thiocyanate complex containing carbonyl ligands. Both the bond angles [Mn-N-C 170.4(5), N-C-S 175.0(6) "3 and the distances [C-N 1.1 43(8), S-C 1.637(7) A] of 9b clearly demonstrated the nature of the Mn-NCS bond, which is consistent with spectral data. Comparison of the co-ordination chemistry of dpmp with CH,C(CH,PPh,),(CH,OCH,) is discussed.
منابع مشابه
Synthesis and studies of the coordination chemistry with catalytic applications of tripodal ligands based on nitrogen , oxygen and sulfur donors By Mandeep K Sidhu
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