Unusual Open Eight-Vertex Oxamolybdaboranes: Structural Characterizations of (η5-C5Me5Mo)2B5(μ3-OEt)H6R (R = H and n-BuO)
摘要:
Reaction of (eta(5)-C5Me5)MoCl4 with a 10-fold excess of LiBH4 followed by thermolysis with excess BH3 center dot THF in toluene led to the formation of two oxamolybdaborane clusters, (eta(5)-C5Me5Mo)(2)B-5(mu(3)-OEt)H6R (2, R = H; 3, R = n-BuO). Clusters 2 and 3 have been characterized by H-1, B-11, and C-13 NMR spectra and X-ray crystal structure determinations. 2 and 3 are notable examples of oxametallaborane compounds where oxygen is contiguously bound to both the cluster metal (molybdenum) and the boron atom.