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Synthesis and Crystal Structure of a Peroxo-Bridged Binuclear Rhodium (III) Complex and its Superoxo-Bridged Analogue

✍ Scribed by John Springborg; Margareta Zehnder

Publisher
John Wiley and Sons
Year
1984
Tongue
German
Weight
449 KB
Volume
67
Category
Article
ISSN
0018-019X

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✦ Synopsis

The reaction of the ammonia diol [(NH,)4Rh(OH)2Rh(NH,),]4' with H,O, yields among other products a peroxo-bridged dimeric species (NH,),Rh(O,)(OH) Rh(NH,),(H,O),. Its structure was determined by single-crystal X-ray diffraction. The crystals are monoclinic with space group P2,/n and lattice constants a = 12.269(5) A, b = 10.769(4) A, c = 15.964(4) A, p = 107.17(3)". The dihedral angle of the RhOORh group in the bimetallic ring deviates by 62" from planarity. The peroxo-bridged complex was found to disproportionate in l~ HC10, and a red superoxobridged complex, [(NH,),Rh(02)(OH)Rh(NH,),(H,0)1(N0,),, was isolated. Its structure was solved by single-crystal X-ray diffraction. The crystals are orthorhombic with space group Pna2, and lattice constants a = 14.997(5) A, b = 11.952(4) A, c = 10.489(4) A. The dihedral angle of the RhOORh group deviates by 7" from planarity.

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