The preparation of complexes {AgX(1c)} (X Cl, Br, I, NO3 and ClO4; 1c = 2,11‐bis(diethylphosphinomethyl)benzo[c]phenanthrene) is reported. The 31P‐NMR spectra of the above complexes were recorded and the 1J(107Ag, 31P) values are compared with the corresponding data for related complexes. The X‐ray crystal structure of [Ag(1c)](ClO4) was determined. There are two crystallographically independent molecules in the unit cell each containing two‐coordinate silver, the O‐atoms of the perchlorate anions being outside bonding range from the central atom. The two molecules, however, show different bonding parameters: Thus for ‘molecule 1’ P(1)Ag(1)P(2) = 167.6(1)°, Ag(1)P(1) = 2.389(3) and Ag(1)P(2) = 2.393(3) Å, while for ‘molecule 2’ P(3)Ag(2)P(4) = 164.8(1)°, Ag(2)P(3) = 2.377(3), and Ag(2)P(4) = 2.378(3) Å. These differences are probably due to packing forces in the crystal lattice.
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Camalli et al. (1988) studied this question.