Syntheses and Structures of Diplatinum Hexatriynediyl Complexes, in Which the sp Carbon Chains Are Shielded by sp3 Carbon Chains
摘要:
When trans, trans-(C6F5)(p-tol(3)P)(2)Pt(Cequivalent toC(3))Pt-(P-p-tol(3))(2)(C6F5) and Ar2P(CH2)(m)PAr2 (m /Ar = 8 / p-tol, 10/ Ph, 11 / Ph, 12 / Ph, 14 / p-tol) are reacted, P-tol(3)P is displaced to give products in which the diphosphines span the platinum end groups. One crystal structure (m = 14) shows a double-helical conformation in which the sp(3) carbon chains twist around the sp chain, and others (m = 10, 11) show nonhelical conformations with lateral shielding of the sp chain.