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Gold(I) ‐Nickel(II)‐4,4′‐bpy‐Phosphine Complexes: Synthesis and Multinuclear NMR Study
Author(s) -
Byabartta Prithwiraj,
Laguna Mariano
Publication year - 2007
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200700180
Subject(s) - chemistry , phosphine , trifluoromethanesulfonate , triphenylphosphine , dichloromethane , proton nmr , molecule , carbon 13 nmr , nmr spectra database , nickel , nuclear magnetic resonance spectroscopy , medicinal chemistry , crystallography , stereochemistry , spectral line , solvent , catalysis , organic chemistry , physics , astronomy
Silver triflate [AgOTf] assisted de‐bromination gives [Ni(dppm/dppe/(PPh 3 ) 2 ) (OTf) 2 ], which on reaction with 4,4′‐bpy and gold(I) phosphines in dichloromethane medium by the self assemble technique leads to [{(L)Ni}{(4,4‐bpy)Au(PPh 3 )} 2 ](OTf) 4 , ( 1,2,3 ) [{(L)Ni(4,4‐bpy)} 4 ](OTf) 8 , ( 4,5,6 ) [L = dppm/dppe/(PPh 3 ) 2 = diphenyl phosphino‐methane, ‐ethane, bis‐triphenylphosphine, OSO 2 CF 3 is the triflate anion]. The maximum molecular peak of the corresponding molecule is observed in the ESI mass spectrum. Ir spectra of the complexes show ‐C=C‐, ‐C=N‐, as well as phosphine stretching. The 1 H NMR spectra as well as 31 P ( 1 H)NMR suggest solution stereochemistry, proton movement, and phosphorus proton interaction. Considering all the moieties, there are a lot of carbon atoms in the molecule reflected by the 13 C NMR spectrum. In the 1 H‐ 1 H COSY spectrum of the present complexes and contour peaks in the 1 H −13 C HMQC spectrum, we assign the solution structure and stereoretentive transformation in each step.