Silver(I)-Selective Thioether Ligands. Solution NMR and X-ray Structural Studies on the Interaction of 2,5,8-Trithia[9]-m-cyclophane and Related Ligands with Silver(I)
摘要:
The reaction of 2,5,8-trithia[9]-m-cyclophane (L(1)) with AgCF3SO3 in a 1:1 ratio produced the polymeric material {[Ag(L(1))][CF3SO3]. CH3CN}(x). This polymer crystallized in the space group P2(1)/c with a = 11.218(2) Angstrom, b = 11.317(3) Angstrom c = 17.035(7) Angstrom, beta = 104.17(2)degrees, V = 2097(2) Angstrom(3), and Z = 4. The structure refined to R = 4.11% and R(W) = 5.69% for 1261 reflections with F-o(2) > 3 sigma(F-o(2)). NMR solution data indicate a multiplicity of solution structures in rapid exchange. The exchange of L(1) and analogues with their respective silver complexes in CD3CN/CD2Cl2 was examined by NMR spectroscopy. The L(1) exchange on silver was shown by the dilution method to be D or I-D in character.
Boric acid mediated preparation of mesocyclic thiocrown ethers containing xylylene units. Molecular structures of 3,8-dibenzo-1,6-di-thiacyclodecane and 2,5,8-trithia-(9)-p-benzenophane
摘要:
Reaction of a dithiol with B(OH)3 and base in MeOH followed by reaction with xylylene dibromides proceeds selectively to give the corresponding ortho, meta or para-cyclophanes in good yield (70-86 %). The syntheses of examples of all three types of benzenophanes are discussed. The molecular structures of 3,8-dibenzo-1,6-dithiacyclodecane (8) and 2,5,8-trithia-(9)-p-benzenophane (5) have been determined by X-ray crystallography. Crystal data for 8: space group P2(1)/c with a=8.2745(10), b=4.9330(10), c=16.5500(12) A, beta=100.37 (1)-degrees, Z=2; R=0.043 (R(w)=0.045) for 949 reflections (I>2.5 sigma (I)). Crystal data for 5 (150K): Space group P2(1)/c with a=10.310(1), b=7.430 (1), c=17.681(2) A, beta=113.27(1)-degrees, Z=4; R=0.065 (R(w)=0.065) for 1969 reflections (I>2.5 sigma(I)).
Some polythiamacrocycles having aromatic rings as macrocyclic components have been synthesised and tested as sensors in solid-state electrodes. High selectivity for Ag+, even over that for Hg2+, and excellent electrode properties have been found.
Edema, Jilles J. H.; Stock, H. Thijs; Buter, Jan, Angewandte Chemie, 1993, vol. 105, # 3, p. 448 - 451
作者:Edema, Jilles J. H.、Stock, H. Thijs、Buter, Jan、Kellogg, Richard M.、Smeets, Wilberth J. J.、et al.