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Crystal structure of diguanidine hexachlorate tellurate(IV)

Authors
Journal
Journal of Alloys and Compounds
0925-8388
Publisher
Elsevier
Publication Date
Volume
196
Identifiers
DOI: 10.1016/0925-8388(93)90605-m

Abstract

Abstract A new crystalline complex compound [NH 2C(NH 2) 2] 2TeCl 6 was synthesized. At room temperature the crystal is triclinic, space group P 1 , with lattice parameters: a = 7.355(1) A ̊ ; b = 7.433(1)Å; c = 7.741(1) A ̊ ; α = 79.51(2) o; β = 88.61(2)°; γ = 64.59(3) o; V = 375.02(12) A ̊ 3 ; Z = 1, molecular weight, 459.5; D o, not measured; D c = 2.034(2) Mg m −3. The structure consists of discrete, centrosymmetric TeCl 6 octahedra with a mean Te-Cl distance of 2.537(1) Å and partly disordered, protonated guanidine. Guanidine cation, [NH 2C(NH 2) 2] +, is linked to the inorganic units through weak NH … Cl hydrogen bonds. Such a mobile system is capable of order-disorder-type phase transitions.

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