Inorganic Chemistry, Vol.50, No.11, 4677-4679, 2011
Topological Variations of the PDP Ligand and Its Prospects in Molybdenum(0) Dearomatization Agents
The compounds fac-(K-3-PDP)Mo(CO)(3) {1; PDP = 2-[[2-(1-(pyridin-2-ylmethyl)pyrrolidin-2-yl)pyrrolidin-1-yl]methyl]pyri dine}, [(cis-beta-PDP)Mo(NO)(CO)] PF6 ([cis-beta-3]PF6), [(cis-alpha-PDP)Mo(NO)(CO)]PF6 ([cis-alpha-3] PF6)[(cis-alpha-PDP)Mo(NO)Br]PF6 ([4]PF6), [(trans-PDP)Cu] (BF4)(2)center dot CH3CN ([5](BF4)(2)center dot CH3CN), and [(trans-PDP)Cu](OSO2CF3)(2) ([5](OSO2CF3)(2)) have been synthesized and structurally characterized by single-crystal X-ray diffraction. These are the first reported complexes of PDP on metal centers other than iron(II). The observed configurations indicate a broader range of accessible PDP topologies than has been reported. The {(cis-alpha-PDP)Mo(NO)}(+) fragment is found to be less pi-basic than the dearomatizing {Tp(MeIm)Mo(NO)} fragment [Tp = hydridotris(1-pyrazolyl)borato; MeIm = 1-methylimidazole].