Synthesis and characterization of rare examples of stable potassium and arylcalcium triethylboranate complexes
摘要:
Stabilization of potassium triethylboranate can be achieved in solution as well as in the solid state with tridentate 1,3,5-trimethyl-1,3,5-triazinane (tmta) as dimeric [(tmta)K(mu-H)BEt3](2) (1). The metathesis reaction of the post- Grignard reagent [2,6-(tol)(2)C6H3-Ca(thf)(3)I] (2) with potassium triethylboranate yields an unusual hydrogen bridged organocalcium contact ion pair as hydrocarbon soluble [(thf)(dme)Ca(C6H3-2,6-tol(2))HBEt3] (3) which shows no tendency to dismutate to the homoleptic derivatives. (C) 2010 Elsevier B.V. All rights reserved.