Synthesis and Crystal Structure of Lanthanum Complex of 1-Methyl-1,4,7,10-Tetraazacycl ododecane

Abstract

Abstract: The complex [La(L)(CH₃CN)(H₂O)(CF₃SO₃)₃] was synthesized, where L = 1-methyl-1,4,7,10-tetraazacyclododecane.The crystal structure of the complex was determined and a final Rvalue of 0.060 and R_w value of 0.064 were obtained, respectively.The crystal belongs to a monoclinic system, space group is P2₁/n with a=0.9700(2) nm, 6=1.5966(2) nm, c = 1.9085(1) nm, β= 104.71(3)°, V = 2.8588(50) nm³, Z = 4, D_calc=1.93 g/cm³.The coordination number of lanthanum ion is nine, forming a distorted monocapped square antipriosm.

Key words: Polyaza macrocyclic, Lanthanum, Complex, Crystal structure

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WEI Ping-rong, JIN Tian-zhu, XU Guang-xian, JIN Zhong-Sheng. Synthesis and Crystal Structure of Lanthanum Complex of 1-Methyl-1,4,7,10-Tetraazacycl ododecane[J]. Chem. J. Chinese Universities, 1992, 13(4): 437.

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Synthesis and Crystal Structure of Lanthanum Complex of 1-Methyl-1,4,7,10-Tetraazacycl ododecane

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