The title complex {[Ni(TCB)2/2(Him)2(H2O)2]· 6H2O}n(where TCB = 1,2,4,5 benzentetracarboxylic anion, Him=imidazole) has been synthesized in aqueous solution. The <IMG SRC="IMAGE/12180050.JPG" HEIGHT=...The title complex {[Ni(TCB)2/2(Him)2(H2O)2]· 6H2O}n(where TCB = 1,2,4,5 benzentetracarboxylic anion, Him=imidazole) has been synthesized in aqueous solution. The <IMG SRC="IMAGE/12180050.JPG" HEIGHT=11 WIDTH=12>crystal structure has been determined by single crystal X ray diffraction method. It crystallizes in the triclinic system, space group (# 2) with a=1.0661(4)nm,b=1.1175(3)nm,c=1.0062(4)nm,α =94.03(3)° ,β = 110.81(3)° ,γ =114.71(2)° ,V=0.9837(7)nm3,Z=1,F(000)=478,DC=1.553g· cm- 3,F.W.=920.11,u=10.41cm- 1,R=0.040,RW=0.051.In this compound, one of the nickel atom is coordinated by two oxygen atoms from TCB, two oxygen atoms from two water molecules and two nitrogen atoms from two imidazole molecules in a trans fashion to complete an octahedron; whereas the other is ligated by four nitrogen atoms from four imidazole molecules to form a planar square geometry.展开更多
At room temperature,a coordination polymer [Ni(btec)(H2O)4][Ni(imi)2(H2O)4]·2H2O was synthesized by reaction of NiCl2·6H2O,1,2,4,5-benzenetetracarboxylic dianhydride and imidazole in a water/THF solution.The...At room temperature,a coordination polymer [Ni(btec)(H2O)4][Ni(imi)2(H2O)4]·2H2O was synthesized by reaction of NiCl2·6H2O,1,2,4,5-benzenetetracarboxylic dianhydride and imidazole in a water/THF solution.The structure was determined by X-ray diffraction crystal structure analysis.It crystallizes in triclinic P1 space group with the crystal cell parameters of a=0.675 42(2) nm,b=1.000 14(1) nm,c=1.090 88(3) nm,α=74.140(2)°,β=74.388(1)°,γ=73.239(2)°,and V=0.664 09(3) nm3,Z=1.The crystal structure shows that Ni1 atom is coordinated by four water and two imidazole molecules,while Ni2 is coordinated by four water molecules and two carboxyl oxygen atoms.The 1,2,4,5-benzenetetracarboxylate ions bridge Ni2 coordination centers to form one-dimensional chain structure.Moreover,the chains are further linked together by hydrogen bonds to form a two-dimensional network.展开更多
文摘The title complex {[Ni(TCB)2/2(Him)2(H2O)2]· 6H2O}n(where TCB = 1,2,4,5 benzentetracarboxylic anion, Him=imidazole) has been synthesized in aqueous solution. The <IMG SRC="IMAGE/12180050.JPG" HEIGHT=11 WIDTH=12>crystal structure has been determined by single crystal X ray diffraction method. It crystallizes in the triclinic system, space group (# 2) with a=1.0661(4)nm,b=1.1175(3)nm,c=1.0062(4)nm,α =94.03(3)° ,β = 110.81(3)° ,γ =114.71(2)° ,V=0.9837(7)nm3,Z=1,F(000)=478,DC=1.553g· cm- 3,F.W.=920.11,u=10.41cm- 1,R=0.040,RW=0.051.In this compound, one of the nickel atom is coordinated by two oxygen atoms from TCB, two oxygen atoms from two water molecules and two nitrogen atoms from two imidazole molecules in a trans fashion to complete an octahedron; whereas the other is ligated by four nitrogen atoms from four imidazole molecules to form a planar square geometry.
文摘At room temperature,a coordination polymer [Ni(btec)(H2O)4][Ni(imi)2(H2O)4]·2H2O was synthesized by reaction of NiCl2·6H2O,1,2,4,5-benzenetetracarboxylic dianhydride and imidazole in a water/THF solution.The structure was determined by X-ray diffraction crystal structure analysis.It crystallizes in triclinic P1 space group with the crystal cell parameters of a=0.675 42(2) nm,b=1.000 14(1) nm,c=1.090 88(3) nm,α=74.140(2)°,β=74.388(1)°,γ=73.239(2)°,and V=0.664 09(3) nm3,Z=1.The crystal structure shows that Ni1 atom is coordinated by four water and two imidazole molecules,while Ni2 is coordinated by four water molecules and two carboxyl oxygen atoms.The 1,2,4,5-benzenetetracarboxylate ions bridge Ni2 coordination centers to form one-dimensional chain structure.Moreover,the chains are further linked together by hydrogen bonds to form a two-dimensional network.
