Tetrairidium dodecacarbonyl

Tetrahydropyridines, 21 111 Tetrahydroquinolines, 21 187,192,198-199 Tetrahydroxyalkylethylenediamine titanate complexes, 25 95 Tetrahydroxyborate anion, 4 256-258 Tetrahydroxycuprate, 7 770 Tetrahymena, ribozyme from, 17 618, 619 Tetrairidium dodecacarbonyl, 16 63 Tetraisopropyl titanate, 25 92 Tetrakaidecahedron structure, 12 8 Tetrakis(2,4-di-lerl-butylphenyl)-4,4 -biphenylenediphosphonite, 3 114 Tetrakis(2-chloroethyl)... 

Important pioneer work in the synthesis of polynuclear metal carbonyls was made by reduction of simple metal salts in the presence of carbon monoxide or similar ligands. The best results are obtained in general for the most stable clusters such as triruthenium, triosmium, tetrarhodium, and tetrairidium dodecacarbonyls. Thus, heterogeneous pyrolysis reactions of metal halides with carbon monoxide in the presence of halide acceptors such as Cu or Zn under relative drastic conditions of temperature and pressure can be used for preparing these types of three and tetranuclear carbonyl clusters ... 

Tetrairidium dodecacarbonyl Ir, sp)z restrained positions, severe disorder, Ir— Ir 2.693 avera, tetrahedral cluster 196... 

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