Unsymmetrical Dirhenium Complexes That Contain [Re2]6+ and [Re2]5+ Cores Complexed by Tridentate Ligands with P2O and P2N Donor Sets

摘要: The quadruply bonded dirhenium(III) complex (n-Bu4N)2Re2Cl8 reacts with tridentate ligands that contain essentially planar P,O,P donor sets to afford the complexes Re2Cl6(η3-L1) (3) (L1 = bis[2-(diphenylphosphino)phenyl]ether) and (n-Bu4N)[Re2Cl7(η1-L2)] (4) (L2 4,6-bis(diphenylphosphino)dibenzofuran). Spectroscopic electrochemical data support unsymmetrical structure Cl4ReReCl2(η3-L1) in case of 3, while 4 contains monodentate P-bound L2; both ReRe bonds. synthon cis-Re2(μ-O2CCH3)2Cl4(H2O)2 L1, L2, 2,6-bis(diphenylphosphinomethyl)pyridine (L3), bis[2-(diphenylphosphino)ethyl]amine (L4), N,N-bis[2-(diphenylphosphino)ethyl]trimethylacetamide (L5) give paramagnetic Re2(μ-O2CCH3)Cl4(η3-Ln) (5−9) Re lability μ-acetato 5−9 has been demonstrated by reactions compounds 5 (n 1) 7 3) 4-Ph2PC6H4CO2H, 2-Ph2PC6H4CO2H, quinoline-4-carboxylic acid 10−12 (from 5) and...