SYNTHESIS AND X-RAY CRYSTAL-STRUCTURE ANALYSIS OF DELTA,LAMBDA-MU-HYDROXO-MU-TRIFLUOROACETATO-BIS[BIS(ETHYLENEDIAMINE) CHROMIUM(III)] BROMIDE TRIPERCHLORATE MONOHYDRATE

被引：10

作者：

KAAS, K

SPRINGBORG, J

机构：

[1] Chemistry Department, Royal Veterinary and Agricultural University, Thorvaldsensvej 40, Frederiksberg C,DK-1871, Denmark

来源：

ACTA CHEMICA SCANDINAVICA SERIES A-PHYSICAL AND INORGANIC CHEMISTRY | 1986年 / 40卷 / 08期

关键词：

Solutions - Binary alloys - Single crystals - Chlorine compounds - Inorganic compounds - Positive ions - Chromium alloys - Crystal structure;

D O I：

10.3891/acta.chem.scand.40a-0515

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reaction of the dinuclear complex cation Δ,Δ-[(en)2Cr(OH)2Cr(en)2]4+ in aqueous CF3COOH led to the formation of the singly bridged species Δ,Δ-[(CF3COO)(en)2Cr(OH)Cr(en)2(CF3COO)]3+ which was isolated as a perchlorate salt (91 %). This species hydrolyzed in aqueous solution to give the heterobridged cation Δ,Δ-[(en)2Cr(OH)(CF3COO)Cr(en)2]4+ which was isolated as a bromide salt (73 %). The latter cation was characterized by single-crystal structure analysis of the monobromide triperchlorate monohydrate salt. These crystals are orthorhombic, space group Pnma with Z = 4, unit cell dimensions: a = 17.687(3); b = 11.703(3); and c = 15.304(4)Å. The structure was solved and refined to R = 0.059 from 1104 diffractometer-collected intensities. The complex ion contains a crystallographic mirror plane and the conformations of the chelate rings are λλΔ,Δδδ. The bridging six-membered ring is nearly planar. The Cr-Cr separation is 3.616(2)Å. The CF3 group and the ClO4- ions are disordered.

引用

页码：515 / 521

页数：7

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