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In this paper, the molecular and crystal structures of the NH4[Y(trans CYDTA)(H2O)2]· 4.5 H2O(trans CYDTA=trans 1,2 cyclohexanediaminetetraacetic acid) are reported. The crystal data are as follows: Triclinic system, space group,a=0.8599(6)nm,b=1.0021(7)nm,c=1.4370(9)nm,α =88.095(13)° ,β =75.559(1)° ,γ =88.344(12)° ,V=1.1981(14)nm3,Z=2, M=708.68,Dc=1.570g· cm- 3, μ =2.506mm- 1 and F(000)=590. The final R1 and wR2 are 0.0571 and 0.1350 for 4205 [I >2.0σ (I)] unique reflections and 0.1007 and 0.1615 for all 4981 reflections, respectively. In the title complex, the anion [Y(trans CYDTA)(H2O)2]- has an eight coordination structure with distorted square antiprism. The trans CYDTA which acts as a hexadentate ligand with four O atoms and two N atoms and two H2O molecules directly coordinate to central metal Y? ion. It can be known that the Y? ion can form an eight coordinate compound with aminopolycarboxylic acid ligands in addition nine coordination structure.
In this paper, the molecular and crystal structures of the NH4 [Y (trans CYDTA) (H2O) 2] 4.5 H2O (trans CYDTA = trans 1,2 cyclohexanediaminetetraacetic acid) are reported. The crystal data are as follows: Triclinic system, a = 0.8599 (6) nm, b = 1.0021 (7) nm, c = 1.4370 (9) nm, α = 88.095 (13) °, β = 75.559 , V = 1.1981 (14) nm3, Z = 2, M = 708.68, Dc = 1.570 g · cm -3, μ = 2.506 mm -1 and F (000) = 590. The final R 1 and wR 2 are 0.0571 and 0.1350 for 4205 [I> 2.0σ (I)] unique reflections and 0.1007 and 0.1615 for all 4981 reflections, respectively. In the title complex, the anion [Y (trans CYDTA) (H2O) 2] - has an eight coordination structure with distorted square antiprism. The trans CYDTA which acts as a hexadentate ligand with four O atoms and two N atoms and two H2O molecules directly coordinate to central metal Y? ion. It can be known that the Y? ion can form an eight coordinate compound with aminopolycarboxylic acid ligands in addition nine coordination structure.