Formation of an allylic cluster in the reactions of [Ru3(CO)12] with diethylamino-propyne and trimethylsilyl propargyl alcohol. Crystal structure of [(μ-H)Ru3(CO)9(μ3-η3-C3H3)]
摘要:
The title complex (mu-H)Ru-3(CO)(9)(mu(3)-eta(3)-C3H3) has been obtained following two different reaction pathways: one is the deamination of diethylaminopropyne, HCdropCCH(2)NEt(2), in the presence of Ru-3(CO)(12) under thermal conditions. The other is the reaction of trimethylsilylpropargyl alcohol, (HO)H(2)CCdropC(SiMe3) (TSPA), with Ru-3(CO)(12). The complex is obtained both under thermal conditions and in the reaction of the carbonyl with TSPA in CH3OH/KOH (followed by acidification). Other reaction products, deriving from the loss of Me3Si and of HCHO fragments from TSPA, have also been characterized. Complex (mu-H)Ru-3(CO)(9)(mu(3)-eta(3)-C3H3) has been spectroscopically characterized and its crystal structure was determined by an X-ray analysis. An isosceles triangle of Ru atoms with an edge bridged by an H atom, is coordinated by an allylic moiety sigma-bonded to two Ru atoms and pi-interacting with the third Ru atom. (C) 2003 Elsevier Science B.V. All rights reserved.