68490-69-7Relevant articles and documents
Tungsten(VI) neopentylidyne complexes
Schrock,Clark,Sancho,Wengrovius,Rocklage,Pedersen
, p. 1645 - 1651 (2008/10/08)
Tungsten hexachloride reacts with 6 equiv of neopentyllithium in ether to give volatile, yellow, crystalline W(CCMe3)Np3 (Np = CH2CMe3) in poor yield. W(CCMe3)Np3 can be prepared in 50-70% yield by adding W(OMe)3Cl3 to 6 equiv of NpMgCl in ether. W(CCMe3)Np3 reacts with 3 equiv of HC1 in the presence of NEt4Cl to give blue [NEt4][W(CCMe3)Cl4] and in the presence of dme to give W(CCMe3)(dme)Cl3 (dme == 1,2-dimethoxyethane). The several phosphine adducts of W(CCMe3)Cl3 which have been prepared include W(CCMe3)(L)Cl3 (L = PEt3 or PMe3), W(CCMe3)(PMe3)2Cl3+ and W(CCMe3)(PMe3)3Cl3. Straightforward reactions between [NEtJ or W(CCMe3)(dme)Cl3 and LiX (X = OCMe3, NMe2, N-i-Pr2, or SCMe3) give the volatile, pale yellow to white, monomeric complexes, W(CCMe3)X3.