The Phosphine- Aryldiethynyls(-CC(Ar)CC-)-gold(I)-gold(III)- Complexes: Synthesis and spectral study.

Abstract

[Au2(dppm/dppe/dppa)(Cl)2], which on reaction with Aryldiethynyls, -CC(Ar)CC-, and gold(I) phosphines in MeOH, CH2Cl2 medium, by the self assembly technique leads to [(PPh3)Au(1,4-B)Au(PPh3/PPh-oMe/PPh2Me/PPhMe2/PCy3/PNEt2/PNMe2/AsPh3/DAPTA)], (1a-1j,2), [{Au2(dppm/dppe/dppa)}{(1,4B)Au(PPh3/PPh-oMe/PPh2Me/PPhMe2/PCy3/PNEt2/PNMe2/AsPh3)}2], (3,6,7,8,9,10,11), [{Au4(dppm/dppe/dppa)2(1,4B)2}], (4), [(AuPPh3)2AuIII(14B)(Mes/C6F5)2, (5a,5b) [dppm/dppe/dppa = diphenyl phosphino-methane(a), -ethane(b), ammine(c), C6F5/Mes pentafluorophenyl/mesitylene, 14B = arylethynyl benzene, DAPTA=diacetyl 1,3,5-Triaza-7-phosphaadamantane]. 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, mesitylene and pentafluorophenyl stretching. The 1H NMR spectra as well as 31P (1H)NMR suggest solution stereochemistry, proton movement and phosphorus proton interaction. 13C (H)NMR spectrum reflects the molecular skeleton. In the 1H-1H COSY spectrum of the present complexes assign the solution structure. Complex 2 is water soluble and the spectra measured in D2O.
Keywards: gold(I), gold(III), 14B, NMR,ESIMS,IR.