061ChemInform Abstract (theoretical analysis).

No abstract

The preparation and some physical properties of complexes of the types [MX,L,] where M = Re, Ru, or 0 s and [MX,L,] where M = Re, 0 s . or Ir and L = tertiary monophosphines are described. A few tertiary monoarsine analogues are also included.

Ir; X = CI or Br; L = mono(tertiary phosphine) or mono(tertiary arsine)] are described. The former group g e n era I I y h av e transc o n f i g u ratio n s a n d the I at t e r meridional.The structural configurations of the complexes with tzs4 metal electron configurations are reliably determined by I H n.m.r. spectral measurements. These have shown that the complexes [ReCi,( PR3),] have mer-configurations and the complexes [OsCI,( PR, ), ] probably have trans-configurations. For complexes with t 2: configurations only broad IH n.m.r. spectra were observed, which, except for [RuCI,(PMe,Ph),],were of no use for structural assignments. However, e.s.r. spectral measurements have confirmed the suggested configurations for the t i : complexes.Far-i.r. studies in the solid state have in general supported the above configurations but are not definitive, especially where complexes of transition elements of the Third Period are concerned.

No abstract