TY - JOUR
T1 - Synthesis and circular dichroism spectra of silver(I) complexes with R,R-DIOP (4R,5R-trans-4,5-bis[(diphenylphosphino)methyl]-2,2-dimethyl-1,3-dioxalane)
T2 - Crystal structures of [AgCl(R,R-DIOP)]2·2CHCl3, {[AgBr(R,R-DIOP)]2}2·CH2Cl 2·2H2O, [AgI(R,R-DIOP)]2 and [AgSCN(R,R-DIOP)]2
AU - Wu, Biao
AU - Wu, Xin Tao
AU - Tian, Xuan
AU - Sun, Wen Hua
PY - 2001/12/21
Y1 - 2001/12/21
N2 - The title silver(I) complexes as [AgX(R,R-DIOP)]2 dimers (X=Cl, Br, I or SCN) were synthesized either by the reaction of [Ag(NO3)(R,R-DIOP)]n with NaX or the reaction of AgX with R,R-DIOP. The complexes were confirmed by elemental analysis, IR, 1H- and 31P-NMR, UV-vis and circular dichroism (CD) spectra, as well as single-crystal X-ray characterization. X-ray analysis showed that the silver atoms are tetrahedral, surrounded by two bridged halides and two phosphorus atoms of the bridged R,R-DIOP ligands. The AgAg distances, ranging from 3.065(6) to 3.724(1) Å, are dependent on the polarizability of the halide anions. All of the solid-state structures of the complexes are crystallized in triclinic, space group P1 (no. 1). The CD spectra of these complexes demonstrate their chirality, and their Cotton effects vary according to the different halides, i.e. a negative band (at 241 nm) for 1 (X=Cl), a positive one for 2 (X=Br) and 3 (X=I), and a strong positive band for 4 (X=SCN).
AB - The title silver(I) complexes as [AgX(R,R-DIOP)]2 dimers (X=Cl, Br, I or SCN) were synthesized either by the reaction of [Ag(NO3)(R,R-DIOP)]n with NaX or the reaction of AgX with R,R-DIOP. The complexes were confirmed by elemental analysis, IR, 1H- and 31P-NMR, UV-vis and circular dichroism (CD) spectra, as well as single-crystal X-ray characterization. X-ray analysis showed that the silver atoms are tetrahedral, surrounded by two bridged halides and two phosphorus atoms of the bridged R,R-DIOP ligands. The AgAg distances, ranging from 3.065(6) to 3.724(1) Å, are dependent on the polarizability of the halide anions. All of the solid-state structures of the complexes are crystallized in triclinic, space group P1 (no. 1). The CD spectra of these complexes demonstrate their chirality, and their Cotton effects vary according to the different halides, i.e. a negative band (at 241 nm) for 1 (X=Cl), a positive one for 2 (X=Br) and 3 (X=I), and a strong positive band for 4 (X=SCN).
KW - CD spectra
KW - Cotton effect
KW - R,R-DIOP
KW - Silver complexes
KW - Structures
UR - http://www.scopus.com/inward/record.url?scp=0042910462&partnerID=8YFLogxK
U2 - 10.1016/S0022-328X(01)01171-8
DO - 10.1016/S0022-328X(01)01171-8
M3 - Article
AN - SCOPUS:0042910462
SN - 0022-328X
VL - 640
SP - 57
EP - 64
JO - Journal of Organometallic Chemistry
JF - Journal of Organometallic Chemistry
IS - 1-2
ER -