Reaction of (MeC 5H 4) 3Ln with HOCH 2CH 2NMe 2 in tetrahydrofuran(THF) gives the new complexes [(MeC 5H 4) 2Ln(μ OCH 2CH 2NMe 2)] 2 (Ln=Sm, Y, Nd) with nitrogen functionalized μ alkoxide ligand. The ...Reaction of (MeC 5H 4) 3Ln with HOCH 2CH 2NMe 2 in tetrahydrofuran(THF) gives the new complexes [(MeC 5H 4) 2Ln(μ OCH 2CH 2NMe 2)] 2 (Ln=Sm, Y, Nd) with nitrogen functionalized μ alkoxide ligand. The complexes were characterized by elemental analysis and IR, and [(MeC 5H 4) 2Sm(μ OCH 2CH 2NMe 2)] 2 was structurally characterized by the X ray diffraction to be a dimer formed by two unsymmetric oxygen bridges. The complex has a tricyclic skeleton with the additional two Sm-N bonds via intramolecular coordination of OCH 2CH 2NMe 2. The coordination number of the central metal Sm is nine. The title complexes show good catalytic activity for ring opening polymerization of ε caprolactone.展开更多
Complex(n-Bu_4N)[Mo_2O_2(OMe)(mp)_3][1,mp=(o-OC_(?)H_4S)^(2-)]was synthesized by the reaction of MoOCl_3(THF)_2 and Na_2mp in EtOH and crystallized in monoclinic space group P2_(?)/n with crystal data:a=13.910(3),b=23...Complex(n-Bu_4N)[Mo_2O_2(OMe)(mp)_3][1,mp=(o-OC_(?)H_4S)^(2-)]was synthesized by the reaction of MoOCl_3(THF)_2 and Na_2mp in EtOH and crystallized in monoclinic space group P2_(?)/n with crystal data:a=13.910(3),b=23.554(3),c=12.558(2)(?),β=105.20(2)°,Z=4,D_o=1.455g/ cm^3,final R=0.077 for 5325 reflections[I>3σ(I)].The two[Mo(O)mp]^+ moicties are bridged by one 1,2-bidentate ligand mp^(2-) with exceedingly small bite angle(69.0°)and bite distance (2.70(?))and by a methoxy group.The structure can be interpreted as two distorted octahedra around the Mo atoms sharing a face.Attempts have been made to provide structural informa- tions for the syntheses of modelling compounds of FeMoco by comparing the Mo—O and Mo—S bond distances of o-mercaptophenolate ligated compounds to those of the molybdenum site of nitrogenase.展开更多
文摘Reaction of (MeC 5H 4) 3Ln with HOCH 2CH 2NMe 2 in tetrahydrofuran(THF) gives the new complexes [(MeC 5H 4) 2Ln(μ OCH 2CH 2NMe 2)] 2 (Ln=Sm, Y, Nd) with nitrogen functionalized μ alkoxide ligand. The complexes were characterized by elemental analysis and IR, and [(MeC 5H 4) 2Sm(μ OCH 2CH 2NMe 2)] 2 was structurally characterized by the X ray diffraction to be a dimer formed by two unsymmetric oxygen bridges. The complex has a tricyclic skeleton with the additional two Sm-N bonds via intramolecular coordination of OCH 2CH 2NMe 2. The coordination number of the central metal Sm is nine. The title complexes show good catalytic activity for ring opening polymerization of ε caprolactone.
基金Project supported by the National Natural Science Foundation of Chinathe Natural Science Foundation of the Chinese Academy of Sciences the Natural Science Foundation of Fujian Province.
文摘Complex(n-Bu_4N)[Mo_2O_2(OMe)(mp)_3][1,mp=(o-OC_(?)H_4S)^(2-)]was synthesized by the reaction of MoOCl_3(THF)_2 and Na_2mp in EtOH and crystallized in monoclinic space group P2_(?)/n with crystal data:a=13.910(3),b=23.554(3),c=12.558(2)(?),β=105.20(2)°,Z=4,D_o=1.455g/ cm^3,final R=0.077 for 5325 reflections[I>3σ(I)].The two[Mo(O)mp]^+ moicties are bridged by one 1,2-bidentate ligand mp^(2-) with exceedingly small bite angle(69.0°)and bite distance (2.70(?))and by a methoxy group.The structure can be interpreted as two distorted octahedra around the Mo atoms sharing a face.Attempts have been made to provide structural informa- tions for the syntheses of modelling compounds of FeMoco by comparing the Mo—O and Mo—S bond distances of o-mercaptophenolate ligated compounds to those of the molybdenum site of nitrogenase.
