Group III Donors

Iridium(iv).—Reduction of IrCli to IrClg by various transition-metal ions does not change the inner co-ordination sphere. A resonance Raman effect has been observed for IrClg . Anomalous polarization was found on all Raman bands and this was ascribed to Jahn-Teller distortions in the excited electronic state. I.r. and 

and absorption (5-6 kK) spectra of Ir in octahedral sites of Y3Ga50 2 have been obtained, and it was concluded that the properties of the T2 ground state are affected by interaction with higher excited states. The e.s.r. spectrum of K2[Ir(N03)g] in K2[Pt(N03)g], expected to involve a 12-co-ordinated complex of Tj symmetry, has been recorded. An isotropic spectrum was observed at 77 K, so any Jahn-Teller effect of the ground term must be dynamic. The hyperfine constants indicated considerable Md - Lti delocalization. 

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Group III Donors. Boron donor ligands. The unusual tris(pyrazolyl)borato-complex [RuL3(CO)2X] [X = Cl, Br, or I L = (16a)] has been prepared ... 

Group III Donors. [(Bi(,Hi2)It(COXPPh3)2] undergoes H-D exchange with D2 in two terminal B—H positions, believed to be of two of the four bound boron atoms. ... 

Group III Donors. B-donor ligands. In an extension of recent studies on Ptn-borallyl complexes, a unique series of complexes of the 71-83117" ligand have been prepared with Ni, Pd, and Pt"... 

Fig. 23. Schematic representation of the group IV donor-hydrogen complex with hydrogen in AB site. The black spheres represent the group V atoms (As), the large white ones the group III atoms (Ga), the small white one the hydrogen atom and the dotted sphere the impurity. The lone pair on the threefold coordinated group V atom is not represented.

The interaction of hydrogen with shallow donors and shallow acceptors in silicon is a problem of particular current interest and controversy. In the case of group V donors or group III acceptors, the donor or acceptor... 

Alpine-Borane3 3-Methyl-2-butanone 62 S b GROUP III HYDRIDE-DONOR REAGENTS... 

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