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Lewis Base Adducts of Group 11 Metal Compounds. part 24. Coordination of triphenylphosphine with silver nitrate. A solid-state cross-polarization magic angle spinning 31P nuclear magnetic resonance, crystal structure, and infrared spectroscopic study of

Singlecrystal X-ray diffract ion structure determi nations, high resolution solid -state crosspolarization magic-angle spinning 31P n.m.r., and far4.r. spectral data are reported for the mononuclear 2 : 1 adducts of triphenylphosphine with copper( I) and gold( I ) halides, [ M (PPh,),X] .

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Recrystallization of [Cu,l,( PPh,),] from toluene has yielded a new polymorph of that compound, (1 ), which has been shown by single-crystal X-ray diffraction analysis to have a tetrametallic 'cubane' structure rather than the expected 'step' structure. Crystals are monoclinic, space group P2,/n, with a = 19.47( 1 ), b = 26.94(1), c = 13.528(5) A, p = 98.98(4)", Z = 4 tetramers; R was 0.06 for No =

The structures of the silver([) complexes [AgBr(PPh,),] and [Ag,X2(PPh,),]*2CHCI, (X = CI or Br) have been determined by single-crystal X-ray diffraction. The complex [AgBr( PPh,),] crystallizes in the monoclinic space group C2/c and contains discrete monomeric [AgBr( PPh,),] units with essentially trigonal-planar AgBrP, co-ordination, and a crystallographic two-fold axis of symmetry coincident with