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Experimental charge density and electrostatic potential of triglycine

机译:三甘氨酸的实验电荷密度和静电势

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The experimental electron density distribution in triglycine has been determined using single-crystal X-ray diffraction data at 123 K to a resolution of (sin theta/lambda)(max) = 1.1 Angstrom(-1). Several multipolar pseudo-atom density refinements were performed against the 7238 observed data in order to estimate the net charges on the atoms. The electrostatic potential around the two molecules is calculated from the parameters derived from these refinements. A charge transfer between the two triglycine molecules of the asymmetric unit is discussed. Crystal data: C6H11N3O4, M-r = 189.2, triclinic, P (1) over bar, Z = 4 (two molecules in the asymmetric unit), T = 123 K, a = 11.585 (1), b = 14.603 (2), c = 4.800 (4) Angstrom, alpha = 89.28 (3), beta = 95.55 (2), gamma = 104.484 (8)degrees, V = 782.5 (7) Angstrom(3), D-x = 1.61 g cm(-3), mu = 1.5 cm(-1) for lambda(Mo) = 0.7107 Angstrom. [References: 21]
机译:已使用123 K的单晶X射线衍射数据确定了三甘氨酸中的实验电子密度分布,其分辨率为(sin theta /λ)(max)= 1.1埃(-1)。对7238个观测数据进行了多次多极伪原子密度细化,以估计原子上的净电荷。根据这些优化方法得出的参数计算两个分子周围的静电势。讨论了不对称单元的两个三甘氨酸分子之间的电荷转移。晶体数据:C6H11N3O4,Mr = 189.2,三斜晶,棒上的P(1),Z = 4(非对称单元中的两个分子),T = 123 K,a = 11.585(1),b = 14.603(2),c = 4.800(4)埃,阿尔法= 89.28(3),贝塔= 95.55(2),伽马= 104.484(8)度,V = 782.5(7)埃(3),Dx = 1.61 g cm(-3),对于λ(Mo)= 0.7107埃,mu = 1.5 cm(-1)。 [参考:21]

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