Transition Metal Substituted Acylphosphines and Phosphaalkenes. 25. Unprecedented Condensation of the Pentamethylcyclopentadienyl Ligand with a Methylene Phosphine Moiety in (h5-C5Me5)(CO)2FeP:C(NMe2)2 Induced by Azodicarboxylates. Structure of [cyclic] h5-C5Me4CH:C(NMe2)PN(CO2CMe3)NH(CO2CMe3)Fe(CO)2.
The metallophosphaalkene (h5-C5Me5)(CO)2FeP:C(NMe2)2 (I) undergoes reaction with dialkyl azodicarboxylates RO2CN:NCO2R (R = CMe3, Et, CH2Ph) to afford complexes II (R = CMe3, Et, CH2Ph) with the novel chelating 3-(tetramethylcyclopentadienyl)-1-phospha-2-propenyl ligand. This ligand system results from a yet unprecedented azocarboxylate-induced condensation of a ring Me substituent with the methylene phosphine fragment of educt I. The mol. structure of II (R = CH2Ph) (P21/c, a = 10.522(3) .ANG., b = 22.124(9) .ANG., c = 12.806(4) .ANG., b = 101.58(3) Deg) was detd. by single-crystal x-ray anal.
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