In:
Canadian Journal of Chemistry, Canadian Science Publishing, Vol. 61, No. 8 ( 1983-08-01), p. 1800-1805
Abstract:
Zn(SbF 6 ) 2 in liquid SO 2 has been shown to act as an acceptor towards a variety of phosphine oxides, sulfides, and selenides, forming complexes which have been characterized in solution using 31 P nmr. Slow-exchange 31 P nmr spectra are reported for the complexes ZnL n 2+ (n = 6, L 2 = Ph 2 P(O)CH 2 P(O)Ph 2 or L 3 = (Ph 2 P(O)(CH 2 ) 2 ) 2 P(O)Ph; n = 4, L 2 = Ph 2 P(E)CH 2 P(E)Ph 2 (E = O, S, or Se) or bidentate (Ph 2 P(E)CH 2 ) 3 CMe (E = S or Se), or L = (C 6 H 11 ) 3 PE (E = O, S, or Se) or R 3 PE (E = S or Se, R = Ph or o-C 6 H 4 Me); n = 3, L 3 = (Ph 2 P(E)(CH 2 ) 2 ) 2 P(E)Ph (E = S or Se) or L = R 3 PE (E = S or Se, R = C 6 H 11 , Ph, or o-C 6 H 4 Me); n = 2, L = R 3 PE (E = S or Se, R = o-C 6 H 4 Me or, perhaps, C 6 H 11 ); n = 1 (possibly), L = (o-C 6 H 4 Me) 3 PS), and partial spectra for [Zn(SeP(C 6 H 11 ) 3 ) x (SP(C 6 H 11 ) 3 ) n−x ] 2+ (n = 3 or 4). No evidence was found for the mixed oxide-chalcogenide species [Zn(EP(C 6 H 11 ) 3 ) x (OP(C 6 H 11 ) 3 ) 4−x ] 2+ . In most cases the 31 P nmr spectra are very similar to those reported earlier for the corresponding cadmium complexes. However, in most instances where comparison could be made it was found that the rate of intermolecular ligand exchange was less for the zinc complexes than for their cadmium counterparts. (Complexes with (Ph 2 P(O)(CH 2 ) 2 ) 2 P(O)Ph and Ph 2 P(O)(CH 2 ) 2 P(O)Ph 2 arc exceptional in being more labile for zinc than cadmium.)
Type of Medium:
Online Resource
ISSN:
0008-4042
,
1480-3291
Language:
English
Publisher:
Canadian Science Publishing
Publication Date:
1983
detail.hit.zdb_id:
1482256-8
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