Synthesis, spectroscopic and magnetic properties of nickel(II) with N-protected amino acids: crystal and molecular structure of bis(N-acetylglycinato)tetraaquonickel(II)
Abstract Nickel(II) complexes of the general formula NiL2·nH2O have been prepared with various N-protected amino acids and characterized by thermogravimetric, magnetic susceptibility, IR and UV spectroscopy. The crystalstructure of bis(N-acetylglycinato) tetraaquonickel(II) has been determined. The coordination around nickel is octahedral with two acetylglycine ligands trans to each other. Acetylglycine
Synthesis, spectroscopic, and magnetic studies of copper(<scp>II</scp>) with N-protected amino acids: crystal and molecular structure of diaquatetrakis(µ-N-benzoyl-α-alaninato)-dicopper(<scp>II</scp>)
Eighteen complexes of copper(II) having the general formula CuL2·nH2O (n= 1–4) with N-protectedaminoacids (HL) have been prepared and characterized by spectroscopic methods and magnetic susceptibility measurements. These complexes belong to three types: binuclear species having bridging bidentate co-ordination through the carboxylate group, mononuclear species having symmetrical chelating bidentate
制备了十八种通式为CuL 2 · n H 2 O(n = 1-4)的铜(II)与N保护的氨基酸(HL)的配合物,并通过光谱法和磁化率测量对其进行了表征。这些络合物属于三种类型:具有通过羧酸根基团架桥双齿配位的双核物种,具有对称螯合双齿配位或桥接双齿配位且无Cu-Cu相互作用的单核物种以及具有高度不对称螯合双齿的单核物种。或通过羧酸根基团进行非螯合的不相同配位。络合物[Cu(Bz-α-AlaO)2(H2 O)} 2 ]在空间空间为P的三斜晶系中结晶,单位细胞参数a = 9.421(2), b = 9.549(2), c = 12.618(3)Å,α= 74.31(2), β= 79.21(2),γ= 88.69(2)°,并且Z =1。使用2 842个独立反射的全矩阵最小二乘优化收敛到最终R = 0.038和R '= 0.052。该配合物具有典型的一水合乙酸铜( II)型结构,平均Cu–
Cristol et al., Bulletin de la Societe Chimique de France, 1955, p. 183,184
作者:Cristol et al.
DOI:——
日期:——
Levene; Steiger; Rothen, Journal of Biological Chemistry, 1932, vol. 97, p. 725
作者:Levene、Steiger、Rothen
DOI:——
日期:——
Fischer,E.; Warburg, Justus Liebigs Annalen der Chemie, 1905, vol. 340, p. 171