As previously reported, the reaction between W2(NMe2)6 and 2,2′-methylenebis(6-tert-butyl-4-methyl-phenol), HO-CH2-OH, in hydrocarbon solvents leads to W2(μ-H)(μ-NMe2)(η2-O-CH2-O)(η3-O-CH-O)(HNMe2)(NMe2), 1, by oxidative cyclometallation to the ditungsten center. Upon heating 1 to greater than 60°C under dynamic vacuum W2(NMe2)2(η2-O-CH2-O)2,2, is formed with elimination of HNMe2. Compound 2 is proposed
如先前报道,在烃类溶剂中,W 2(NMe 2)6与2,2'-亚甲基双(6-叔丁基-4-甲基
苯酚)HO-CH 2 -OH之间的反应导致W 2(μ -H)(μ -NMe 2)(η 2 -O-CH 2 -O)(η 3 -O-CH-O)(HNME 2)(NME 2),1,通过氧化环
金属化的二
钨中心。在动态真空W 2(NMe 2)2下加热1至高于60°C(η 2 -O-CH 2 -O)2,2,与消除HNME形成2。根据NMR数据,提出化合物2具有类似
乙烷的O 2 NW∖WO 2 N核。在室温下将HNMe 2添加到2会将2转化为1。向2的烃溶液中添加其他中性
配体(
吡啶,PMe 3)促进CH氧化成W 2中心和
吡啶加合物W 2(μ- H)(μ-NMe 2)(NME 2)(PY)(η 2 -O-CH 2 -O)(η 3 -O-CH-O),3,得到了充分的特征在于X射线研究。在低温下将PMe 3添加至2表明,