Electrophilic attack of alkyl halide at the cyanide nitrogen in trans-[Fe(H)(CN)(dppe)2]: preparation, structure, and properties of trans-[Fe(H)(CNR)(dppe)2]X (dppe=Ph2PCH2CH2PPh2; R=Me, Et, Pr, i-Pr, n-Bu, CH2CH2Br, CH2CH2CH2I, CH2CHCH2, CH2CCH; X=Br, I)
摘要:
Compound trans-[FeH(CN)(dppe)(2)] (1) reacted with alkyl iodides or alkyl bromides to give Fe(II)-organic isocyanide complexes of the type trans-[FeH(CNR)(dppe)(2)]X[X = I: R = Me (2), Et (3), Pr (4), CH2CH2CH2I (5), i-Pr (6), CH2CH=CH2 (7); X = Br: R = Et (8), Pr (9), n-Bu (10), CH2CH2Br (11), CH2CH=CH2 (12), CH2C double bond CH (13)]. Compound 1 reacted with BF3 to give a Lewis acid-base adduct, trans-[FeH(CN -->BF3)(dppe)(2)]. Compounds 5 and 13 were characterized structurally by X-ray diffraction, in which the hydride ligand appears to be involved in the dihydrogen bonding, M-H . . .H-C. (C) 2000 Elsevier Science B.V. All rights reserved.