{(ReCl3)-Cl-III} core complexes with bifunctional single amino acid chelates

摘要

The reactions of the Re(V) starting material [ReO(PPh3)(2)Cl-3] with ligands of the type XN(Y)Z [X = Y = 2-pyridylmethyl, Z = -CH2CO2Et ((LEt)-Et-1), -CH2CH2CO2Et ((LEt)-Et-2), -CH2CH2CH2CH2CH(NHCO2But)CO2H ((LH)-H-3); X = 2-pyridylmethyl, Y = 2-(1-methylimidazolyl)methyl, Z = -CH2CO2Et (L4Et)] yielded the Re(III) trichloride complexes of the type [ReCl3((LR)-R-n)]. The complexes are mononuclear, paramagnetic species with a facial geometry of the chloride ligands. The nitrogen donors of the tridentate (LR)-R-n ligands complete the distorted octahedral coordination spheres of the complexes. Crystal data: [ReCl3((LEt)-Et-1)] (1), monoclinic, C2/m, a = 16.088(3) Angstrom, b = 9.980(2) Angstrom, c = 12.829(2) Angstrom, beta = 91.384(3), Z= 4, D-calc, = 1.967 g/cm(-3); [ReCl3((LEt)-Et-4)] (4), monoclinic, C2/c, a = 22.880(1) Angstrom, b = 7.4926(4) A, c = 22.560(1) Angstrom, beta = 94.186(1)degrees, Z = 8, D-calc = 2.001 g/cm(-3). [References: 56]