A coordination polymer [Co(dpa)prz0.5]n(1) with double-helix chains has been constructed hydrothermally using H2dpa(H2dpa=diphenic acid),prz(prz=piperazine) and Co(NO3)2.6H2O.The structure and magnetic properties of t...A coordination polymer [Co(dpa)prz0.5]n(1) with double-helix chains has been constructed hydrothermally using H2dpa(H2dpa=diphenic acid),prz(prz=piperazine) and Co(NO3)2.6H2O.The structure and magnetic properties of the complex were investigated.The complex crystallizes in triclinic system and P1 space group.Each Co atom is five-coordinated and takes a distorted tetragonal pyramid geometry.Two carboxylates of the H2dpa ligands bridge four Co(Ⅱ) ions to form infinite right-handed or left-handed helical-C-O-Co-chains.The two types of helical chains are interconnected to each other through the Co (Ⅱ) centers to produce double-helix chains.The chains form a 2D sheet through the coordination interaction of prz molecules between adjacent chains.The sheets are further interlinked by hydrogen bond interactions to generate 3D coordination frameworks.Magnetic studies for complex 1 show stronger antiferromagnetic coupling between the Co(Ⅱ) ions.展开更多
The Complex Co〔S 2P(O- i -C 3H 7) 2〕 3 was synthesized through the reaction of Co 2(CO) 8 with the ligand (C 3H 7- i -O) 2P(S)S-SP(S)(O- i -C 3H 7) 2,and its crystal structure was determined by X-ray four -cycle dif...The Complex Co〔S 2P(O- i -C 3H 7) 2〕 3 was synthesized through the reaction of Co 2(CO) 8 with the ligand (C 3H 7- i -O) 2P(S)S-SP(S)(O- i -C 3H 7) 2,and its crystal structure was determined by X-ray four -cycle diffraction method.The crystal belongs to triclinic,space group Pi,crystal cell parameters:a=9 009(2),b=10 437(2),c=18 858(4)?,α=80 99(3),β=88 55(3),γ=82 01(3)°,V=1734 3(6)? 3,Z=2,Mr=698 7,Dc=1 338g·cm -3 ,μ=1 022mm -1 ,F(000)=732,R=0 0342,Rw=0 0812.The structural analysis showed that six sulfur atoms from three ligands 〔S 2P(O- i -C 3H 7) 2〕 coordinate with a cobalt atom,CoS 6 framework in molecular stucture approximately octahedral.The complex was also characterized by IR? 1H NMR? 31 P NMR and MS.展开更多
A new series of binary Schiff base ligands L 1H 2～L 8H 2 were synthesized by Condensation of substituted salicylaldehydes with o diaminobenzene or its sbstituted derivatives.CoL 1～CoL 8 were obtained from L 1H 2～L ...A new series of binary Schiff base ligands L 1H 2～L 8H 2 were synthesized by Condensation of substituted salicylaldehydes with o diaminobenzene or its sbstituted derivatives.CoL 1～CoL 8 were obtained from L 1H 2～L 8H 2 and were characterized by elemental analysis、IR、 1HNMR and MS.展开更多
文摘A coordination polymer [Co(dpa)prz0.5]n(1) with double-helix chains has been constructed hydrothermally using H2dpa(H2dpa=diphenic acid),prz(prz=piperazine) and Co(NO3)2.6H2O.The structure and magnetic properties of the complex were investigated.The complex crystallizes in triclinic system and P1 space group.Each Co atom is five-coordinated and takes a distorted tetragonal pyramid geometry.Two carboxylates of the H2dpa ligands bridge four Co(Ⅱ) ions to form infinite right-handed or left-handed helical-C-O-Co-chains.The two types of helical chains are interconnected to each other through the Co (Ⅱ) centers to produce double-helix chains.The chains form a 2D sheet through the coordination interaction of prz molecules between adjacent chains.The sheets are further interlinked by hydrogen bond interactions to generate 3D coordination frameworks.Magnetic studies for complex 1 show stronger antiferromagnetic coupling between the Co(Ⅱ) ions.
文摘The Complex Co〔S 2P(O- i -C 3H 7) 2〕 3 was synthesized through the reaction of Co 2(CO) 8 with the ligand (C 3H 7- i -O) 2P(S)S-SP(S)(O- i -C 3H 7) 2,and its crystal structure was determined by X-ray four -cycle diffraction method.The crystal belongs to triclinic,space group Pi,crystal cell parameters:a=9 009(2),b=10 437(2),c=18 858(4)?,α=80 99(3),β=88 55(3),γ=82 01(3)°,V=1734 3(6)? 3,Z=2,Mr=698 7,Dc=1 338g·cm -3 ,μ=1 022mm -1 ,F(000)=732,R=0 0342,Rw=0 0812.The structural analysis showed that six sulfur atoms from three ligands 〔S 2P(O- i -C 3H 7) 2〕 coordinate with a cobalt atom,CoS 6 framework in molecular stucture approximately octahedral.The complex was also characterized by IR? 1H NMR? 31 P NMR and MS.
文摘A new series of binary Schiff base ligands L 1H 2～L 8H 2 were synthesized by Condensation of substituted salicylaldehydes with o diaminobenzene or its sbstituted derivatives.CoL 1～CoL 8 were obtained from L 1H 2～L 8H 2 and were characterized by elemental analysis、IR、 1HNMR and MS.
