Author:
Bowmaker Graham A.,Effendy ,Silva Eban N. de,White Allan H.
Abstract
Syntheses and room-temperature single-crystal X-ray structural
characterization of binuclear 1 : 2 adducts formed between silver(I) halides,
AgX (X = Cl, Br, I), and triphenylstibine, SbPh3,
are described. The three complexes are isomorphous, being triclinic,
P-1, a ≈
18·5, b ≈ 14·6, c
≈ 14·5 Å, α ≈ 62·5, β ≈ 74, γ ≈
77°, Z = 2 centrosymmetric dimers.
Conventional R on F were
0·043, 0·038 and 0·046 for 4984, 8479 and 4166
independent, ‘observed’ (I > 3σ(I)) reflections
respectively. In
[(Ph3b)2Ag(µ-X)2Ag(SbPh3)2],
Ag–Sb range between 2·702(1) and 2·744(2) Å,
lengthening slightly from chloride to iodide; Ag–X are
2·567(5)–2·628(4) (Cl),
2·684(1)–2·737(1) (Br) and
2·826(3)–2·869(3) Å (I). The far-infrared spectra of
[(Ph3Sb)2Ag(µ-X)2Ag(SbPh3)2]
show v(AgX) bands at 178, 158 (X = Cl), 121 (X
= Br) and 110 cm-1 (X = I). The splittings
and band widths reflect a decrease in the degree of distortion of the
Ag(µ-X)2Ag units from a symmetrically bridged
structure from X = Cl to I.
Cited by
19 articles.
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