121801-50-1Relevant academic research and scientific papers
Synthesis, structures, EPR and NMR investigations of N,N′-o-phenylen- bis(N″,N″-dialkyl-N?-benzimidoyl-thioureato) complexes of NiII and CuII (alkyl = C2H5, i-C4H9) and of benzo[b]pyrimido-[1,6-d][1,4]diazepin-12- ium-dichlorocuprate(I)
Rodenstein, Axel,Creutzburg, Dirk,Schmiedel, Peter,Griebel, Jan,Hennig, Lothar,Kirmse, Reinhard
, p. 2811 - 2818 (2008)
The synthesis of NiII and CuII complexes of the quadridentate N,N′-o-phenylen-bis(N″,N″-dialkyl-N?- benzimidoyl-thiourea) ligands H2L1 (alkyl = C 2H5) and H2L2 (alkyl = i-C 4H9) and the crystal structures of CuIIL 1 and NiIIL2 are reported. Cu IIL1 crystallizes triclinic, P1 (Z = 2) and Ni IIL2 crystallizes orthorhombic, Pbca (Z = 8). Cu IIL2 could not be obtained as a pure compound; instead of this benzo[b]pyrimido-[1,6-d][1,4]diazepin-12-ium-dichlorocuprate(I) was isolated and characterized by NMR investigations (1H, 13C, APT, H,H COSY, HSQC, HMBC) and by X-ray diffraction. It crystallizes monoclinic, P21/n with Z = 4. The CuII complexes were studied by EPR; CuIIL1 in liquid and frozen solutions, CuIIL2 in diamagnetically diluted CuII/Ni IIL2 powders. The well-resolved 14N and the 63,65Cu hyperfine couplings were used to analyze the spin-density distribution in the first coordination sphere.
