Universal Journal of Chemistry(CEASE PUBLICATION) Vol. 2(5), pp. 65 - 75
DOI: 10.13189/ujc.2014.020501
Reprint (PDF) (444Kb)

Synthesis and Multinuclear NMR Investigation on Binuclear Gold(I)-Diphenylphosphinoammine (dppa)-Arylazoimidazole Complexes

Prithwiraj Byabartta ^1,2,*
1 Departmento de Quimica Inorganica-Instituto de Ciencia de Materiales de Aragon, Universidad de Zaragoza-CSIC, Zaragoza-50009, Spain
² Department of Chemistry, Jogesh Chandra Chaudhuri College, 30- Prince Anwar Shah Road, Kolkata-700033, India

ABSTRACT

Reaction of [Au₂(dppa)Cl₂] with AgOTf in dichloromethane medium followed ligand addition leads to [Au2(dppa)(RaaiR/)](OTf) [RaaiR/ = p-R-C₆H₄-N=N-C₃H₂-NN-1-R/, (1-3), abbreviated as N,N/-chelator, where N(imidazole) and N(azo) represent N and N/, respectively; R = H (a), Me (b), Cl (c) and R/ = Me (1), CH₂CH₃ (2), CH2Ph (3), OSO₂CF₃ is the triflate anion, dppa is diphenylphosphinoammine ring]. The maximum molecular peak of the corresponding molecule ¬ is observed in the ESI mass spectrum. Ir spectra of the complexes show -C=N- and -N=N- stretching near at 1590 and 1370 cm^-1. The 1H NMR spectral measurements suggest methylene, –CH₂–, in RaaiEt gives a complex AB type multiplet while in RaaiCH₂Ph it shows AB type quartets with coupling constant of av. 6.2 Hz. Considering all the moitie there are a lot of different carbon atoms in the molecule which gives a lot of different peaks in the ¹³C NMR spectrum. In the ¹H-¹H COSY spectrum of the present complexes and contour peaks in the ¹H-¹³C HMQC spectrum in the present complexes, assign the solution structure and stereoretentive transformation in each step.

KEYWORDS
Gold(I), Arylazoimidazole, COSY, HMQC NMR, ESI Mass, IR Spectra

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Prithwiraj Byabartta , "Synthesis and Multinuclear NMR Investigation on Binuclear Gold(I)-Diphenylphosphinoammine (dppa)-Arylazoimidazole Complexes," Universal Journal of Chemistry(CEASE PUBLICATION), Vol. 2, No. 5, pp. 65 - 75, 2014. DOI: 10.13189/ujc.2014.020501.

(b). APA Format:
Prithwiraj Byabartta (2014). Synthesis and Multinuclear NMR Investigation on Binuclear Gold(I)-Diphenylphosphinoammine (dppa)-Arylazoimidazole Complexes. Universal Journal of Chemistry(CEASE PUBLICATION), 2(5), 65 - 75. DOI: 10.13189/ujc.2014.020501.