Structural Studies On Copper Complexes With Substituted Water Molecule Ligand

In this thesis, our work deals with two aspects: (1) research on copper complex with substituted water molecule ligand; (2) synthesis and research on Schiff base complexes with thermochrornism.In the first part, two copper complexes have been synthesized . Four single crystals have been obtained.Elemental analysis, ESI-MS and x-ray single crystal diffraction measurements were used to characterize all the compounds. By ESI-MS analysis, we analysed the substituted possibilities of water molecule ligand of copper complex, and by crystal analysis, we proved that water molecule ligand of copper complex was substituted by other ligands.The crystal datas of copper complexes are as follows:The crystal data of CuL1(H₂O) (H₂L= N,N' -1,2-ethanediylbis[N-phenyl)methyl] glycinato] is a=7.2457(16)A,b=13.950(3)A,c = 20.083(5)A,α=90°,β=99.325(4)°,γ= 90°. The center Cu(II) is bonded to two oxygen atoms and two nitrogen atoms from ligand L1 and one oxygen atom from water molecule ligand to form a five-coordinated distorted trigonal bipyramid.The crystal data of CuL1(C₂H₃N₃) is a = 17.292(2) A , b = 9.6271(12) A ,c = 30.771 (4) A,α= 90°,β= 90°,γ= 90°。CuL1(C₂H₃N₃) is derivant of CuL,(H₂O): a water molecule of CuLl(H₂O) is substituted by a 1,2,4-triazole molecule. The center Cu(II)is bonded to two oxygen atoms and two nitrogen atoms from ligand L1 and one nitrogen atom from 1,2,4-triazole to from a five-coordinated distorted trigonal bipyramid.The crystal data of Cu(L1)(C₃H₄N₂)₂ is a= 13.0184(5) A, b = 13.0184(5) A, c = 16.7016(13) A,α= 90°,β= 90°,γ= 90°. Cu(L1)(C₃H₄N₂)₂ is derivant of CuL1(H₂O):a water molecule of CuL1(H₂O) is substituted by two imidazole molecules . The center Cu(II) is bonded to two oxygen atoms and two nitrogen atoms from ligand L1 and two nitrogen atoms from two imidazole molecules ligands to from a six-coordinated distorted octahedronThe crystal data of CuL2(H₂O) (H₂L2= N,N ' -1,2-ethanediylbis[N- [(3-nitrophenyl) methyl]glycinato] is a = 11.5227(11)A , b = 9.1244(9) A, c = 20.782(2) A,α= 90°,β= 96.757(2)°,γ= 90°. The center Cu (II) is bonded to two oxygen atoms and two nitrogen atoms from ligand L2 and one oxygen atom from water molecule ligand to form a five-coordinated distorted trigonal bipyramid. In the second part, two Schiff base ligands and their Zn(II),Cd(II) complexes have been synthesized. Elemental analysis, ESI-MS and IR were used to characterize the compounds. Thermochromic experiments prove that all the compounds have good reversible thermochromism and short time with colour reversion .