Structure of Dibromo(l,2-diaminoethane)palladium(IY)-bis(l,2-diaminoethane)- palladium(II) Tetrakisperchlorate, [Pd(en)2Br2][Pd(en)2](C104)4
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چکیده
Orthorhombic [Pd(C,H8N2),Br2][Pd(C2H8N2)][C104]4, C8H32Br2Cl4N80 I6Pd2 , Mr = 890.42, crystallizes in space group Iba2, a = 9.651(2), b = 13.951(8), c 10.771(2) Ä, Z = 2, V = 1412.80 Ä, dc = 2.05 gem 3 , R = 0.0564 for 1545 unique reflections. Data collection: MoK a , A = 0.71069 Ä, room temperature. The structure is a typical Wolffram's Salt Analogue (WSA) with infinite stacks of planar [Pd(en)2] complex cations bridged by bromides. The ligands are three-dimensionally ordered. Intra-chain and inter-chain hydrogen bridges link the ligands with the Perchlorate counter ions which occupy statistically two different orientations. Diffuse sheets appear together with Bragg reflections for 1 odd layers indicating a thermally activated motion of the bromides in chain direction. This model was confirmed with temperature dependent Weissenberg work.
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تاریخ انتشار 2012