The replacement of chlorides by cytosines in copper(II) complexes containing guanidine derivatives
作者:Atittaya Meenongwa、Unchulee Chaveerach、Khatcharin Siriwong
DOI:10.1016/j.ica.2010.11.030
日期:2011.1
Abstract Two copper(II) chloride complexes of amidino- O -methylurea (L 1 ), [Cu(L 1 )Cl 2 ] ( 1 ), and ( N -benzyl)-amidino- O -methylurea (L 2 ), [Cu(L 2 )Cl 2 ] ( 2 ), were prepared and characterized by elemental analysis, infrared, diffuse reflectance, electron spin resonance and electrospray ionization mass spectra. Their cytosine binding abilities has been studied and found that two cytosine
摘要Two基-O-甲基脲(L 1),[Cu(L 1)Cl 2](1)和(N-苄基)-ino基-O-甲基脲(L 2),[制备了Cu(L 2)Cl 2](2),并通过元素分析,红外,漫反射,电子自旋共振和电喷雾电离质谱进行了表征。研究了它们的胞嘧啶结合能力,发现两个胞嘧啶分子能够通过取代氯化物配体与铜中心配位,产生双功能结合加合物[Cu(L 1)(cyt)2] Cl 2(1c)和[分别为Cu(L 2)(cyt)2] Cl 2(2c)。在两个胞嘧啶结合的产物中,胞嘧啶的CO带向更高的能量转移表明,N(3)–胞嘧啶原子与铜中心配位。在电子和EPR光谱中也观察到了d-d吸光度最大值的大蓝移和从CuN 4发色团分裂出的9个超超细颗粒。它们的热分解也支持了胞嘧啶与复合物1和2的相互作用。密度函数计算也已经执行,并揭示了正方形平面配位几何对于1c和2c都更稳定。发现1c的结合能比2c的结合能低约20%,表