Patel R N, Singh Nripendra, Gundla V L N, Chauhan U K
Department of Chemistry, A.P.S. University, Rewa (M.P.) 486003, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Mar;66(3):726-31. doi: 10.1016/j.saa.2006.04.017. Epub 2006 Jul 27.
A series of ternary copper(II) complexes containing same coordination sphere but difference in the counter ions, viz., [Cu(PMDT)(OAc)]PF(6)(1); [Cu(PMDT)(OAc)]ClO(4)(2); [Cu(PMDT)(OAc)]BF(4)(3) and [Cu(PMDT)(OAc)]BPh(4)(4) where PMDT=N,N,N',N'',N''-pentamethyldiethylenetriamine, OAc=Acetate ion were synthesized and characterized by means of spectroscopic, magnetic and cyclic voltammetric measurements. In frozen solution e.p.r. spectra, an interesting relation g|| >g(perpendicular) has been observed which is atypical of the axially symmetric d(9) Cu(II) (S(Cu)=1/2) having an unpaired electron in a d (x2-y2) orbital. Single crystal X-ray analysis of (1) has revealed the presence of distorted square planar geometry. The influence of the counter ion on the complexes has been examined by performing some biological experiments like superoxide dismutase and anti-microbial activity.
合成了一系列具有相同配位球但抗衡离子不同的三元铜（II）配合物，即[Cu(PMDT)(OAc)]PF₆(1)；[Cu(PMDT)(OAc)]ClO₄(2)；[Cu(PMDT)(OAc)]BF₄(3)和[Cu(PMDT)(OAc)]BPh₄(4)，其中PMDT = N,N,N',N'',N''-五甲基二亚乙基三胺，OAc = 醋酸根离子，并通过光谱、磁性和循环伏安测量对其进行了表征。在冷冻溶液的电子顺磁共振光谱中，观察到了一个有趣的关系g|| > g⊥，这对于在d(x² - y²)轨道中有一个未成对电子的轴对称d⁹铜（II）（S(Cu)=1/2）来说是不典型的。对（1）的单晶X射线分析揭示了其存在扭曲的平面正方形几何结构。通过进行一些生物学实验，如超氧化物歧化酶和抗菌活性实验，研究了抗衡离子对配合物的影响。
