N,N'-ビス(2-カルボキシフェニル)オキサミドの銅(II)およびニッケル(II)錯体

Severa1: new coPPer(II)and, nic: kel(II)complexes of N, N'-bis(2-carboxypheny)oxamide (abbreviated as Hcpox) have been prepared (Table 1) ancl studied by means of magnetic susceptibilities, infrared and eleetronic spectra (Table 2). ln the diamagnetic square-planar complex, K2[Ni(cpex)]e3H20, the ligand is coordinated through carboxy-O and deProtonated amide-N atoms as the quadridentate 1igand (Formula A). The paramagnetic complexi Ni2(cpox)(py)6.3H20, has an octahedral structure bridged by cpox as shown in Formula B, whereas ligands are not coordinaced to nickel in [Ni(en)b][H2 cpox].3HaO. The copper complexes, Cu2(cpox)(NHs)ae4 H20 and Cu2(cpox)(A-A)enHiO (A-A=ethylenediamine, N, N-dimethylethylenediamine, 1, 3-prepanediamine or 2, 2'-bipyridine), are all magnetically subnormal, and bridging structures are suggested as shown in Formula B and C for them. Only the tetragonal complex, Na2[Cu(cpox)].4 H20, is magnetically normal, and its structure may be simiiar to Formula A.