ic6b01094_si_011.cif (1.22 MB)
Two Triazole-Based Phosphine Ligands Prepared via Temperature-Mediated Li/H Exchange: CuI and AuI Complexes and Structural Studies
dataset
posted on 2016-08-11, 17:06 authored by Bimba Choubey, Latchupatula Radhakrishna, Joel T. Mague, Maravanji S. BalakrishnaThe kinetically favored
triazole-based phosphine 1-(2-(diphenylphosphino)phenyl)-4-phenyl-1H-1,2,3-triazole (2, L1) and its
thermodynamically preferred isomer, 5-(diphenylphosphino)-1,4-diphenyl-1H-1,2,3-triazole (3, L2), were obtained
by the temperature-controlled lithiation of 2-bromotriazole followed
by the reaction with chlorodiphenylphosphine. The structures of phosphines 2 and 3 were determined by X-ray diffraction.
Upon reaction with late transition-metal derivatives (CuI, AgI, and AuI), phosphines 2 and 3 form complexes with monodentate (CuI, AgI, and AuI; κ1-P), chelate (CuI; κ2-P,N), bridged bidentate (CuI; μ2-P,N), and tridentate (CuI; μ2,κ2-P,N,N) modes of coordination. Reactions
with copper(I) halides produced mono-, di-, and tetranuclear complexes, whereas the reaction of 2 with [Cu(NCCH3)4]BF4 yielded
the binuclear complex [Cu2(CH3CN)2{o-Ph2P(C6H4){1,2,3-N3C(Ph)C(H)}-μ-(κ-P,κ-N),κ-N}2](BF4)2 (10) with the ligand acting as a six-electron
donor involving phosphorus and two triazole nitrogen atoms. The copper
complexes of 2 and 3 containing rhomboid
Cu2X2 units, [(Cu)2(μ-X)2{o-Ph2P(C6H4){1,2,3-N3C(Ph)C(H)}-κ-P}2] (4, X = Cl; 5, X = Br), on treatment
with 1,10-phenanthroline and 2,2′-bipyridine gave mixed-ligand
complexes of the type [(CuX)(N∩N-κ2-N,N){o-Ph2P(C6H4){1,2,3-N3C(Ph)C(H)}-κ-P}] (N∩N = 1,10-phen and 2,2′-bipy; X = Cl,
Br, and I).
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Keywords
BF2- bromotriazoleμ 2L 1copper complexesX-ray diffractionStructural StudiesCu 2temperature-controlled lithiationrhomboid Cu 2 X 2 unitsCH 3 CNκ 1κ 2tetranuclear complexesmixed-ligand complexesTriazole-Based Phosphine Ligandsphosphines 2triazole nitrogen atomssix-electron donortransition-metal derivatives3 form complexes
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