Chromium tricarbonyl complexes of mono-, bis- and tris-(hydroxymethyl) substituted benzene have been prepared via direct thermolysis of the alcohol and chromium hexacarbonyl in dibutyl ether–THF. Conversion into the corresponding benzyl halide complexes has been carried out using either PBr3, HBr (aq), HBr in glacial acetic acid or BX3 (X = Cl, Br or I). A comparative study showed that PBr3 and BBr3 give similar yields and purity and are superior to HBr. Crystallographic studies have been carried out on three benzyl alcohol complexes [Crη6-C6H4(CH2OH)2-1,4}(CO)3], [Crη6-C6Me4(CH2OH)2-1,4}(CO)3] and [Crη6-C6H3(CH2OH)3-1,3,5}(CO)3] and on two benzyl bromide complexes [Cr(η6-C6H5CH2Br)(CO)3] and [Crη6-C6H4(CH2Br)2-1,4}(CO)3].
已通过在
二丁醚-THF中直接热解醇和
六羰基铬制备了单、双和三(羟甲基)取代苯的
铬三羰基配合物。使用PBr3、HBr(
水溶液)、
冰乙酸中的HBr或BX3(X = Cl、Br或I)将其转化为相应的苄基卤代配合物。比较研究表明,PBr3和BBr3的产率和纯度相似,优于HBr。对三种
苯甲醇配合物[Crη6-
C6H4(CH2OH)2-1,4}(CO)3]、[Crη6-C6Me4(CH2OH)2-1,4}(CO)3]和[Crη6-
C6H3(CH2OH)3-1,3,5}(CO)3]以及两种苄基
溴配合物[Cr(η6-C6H5 )(CO)3]和[Crη6- (
CH2Br)2-1,4}(CO)3]进行了晶体学研究。