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lebo_101 4 years ago
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does ammonia coordinate with VO(acac)2 via its nitrogen atom???

T White 4 years ago
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yes, vanadium is considered coordinatively unsaturated and hence addition of NH3 leads to the formation of octahedral complexes like in case of pyridine. In VO(acac)2, vanadium is five-coordinate with a square-based pyramidal geometry with one vacant coordination site. This in turn reacts with nitrogen-donors where vanadium is six-coordinate.

xgr.anion2009 4 years ago
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Vanadium in VO(acac)2 exists as VO(IV) called oxovanadyl ion. Usually it is 5 co-ordinate with Oxygen at the apical position. 6 coordinated geometry is observed when 2 Vanadium metal centres get linked by bridging oxygens forming bimetallic complexes. I dont know exactly if NH3 can coordinate with VO(acac)2. perhaps it needs an oxidation of VO(IV) to V(V) oxidation state.