16574-29-1Relevant academic research and scientific papers
Syntheses, crystal structures and luminescent properties of Zn(ii)/Cd(ii) supramolecular complexes incorporating 4-sulfinobenzoate and its in situ oxidized ligand
Wang, Huang,Huo, Li-Hua,Deng, Zhao-Peng,Zhao, Hui,Gao, Shan
, p. 3501 - 3508 (2012)
Four new complexes containing d10 metal ions, 4-sulfinobenzoic acid (H2L) and two types of N-heterocyclic ligands, namely, {[Zn(HL)2(H2O)2]n·2nH 2O} (1), {[Cd(HL)2(H2O)2] n·2nH2O} (2), [CdL(2,2′-bipy)(H 2O)2]2 (3) and [ZnL(4,4′-bipy)(H 2O)3]n (4), have been prepared and characterized by element analysis, IR, TG, PL, and powder and single crystal X-ray diffraction. The adjacent Zn(ii)/Cd(ii) octahedra in complexes 1 and 2 are bridged by the sulfinate group of the HL- monoanion in bis-monodentate mode to form 1-D covalent chains. Two Cd(ii) pentagonal bipyramids in complex 3 are bridged by a pair of L2- dianions in μ2-η2(carboxyl):η1(sulfinate) mode to generate a dinuclear motif. The Zn(ii) octahedra in complex 4 are bridged by the 4,4′-bipy into a 1-D chain, whereas the sulfinate groups of L 2- dianions act as terminal coordinate groups and arrange along the same side of the chain. The aforementioned four complexes are all extended into 3-D supramolecular networks through extensive hydrogen bonds together with π-π stacking interactions. When the Zn(ii)/Cd(ii) salts, 4,4′-bipy and H2L are introduced to hydrothermal reactions, two new complexes of {[Zn(4,4′-bipy)2(H2O)4] n·n(SB)·4nH2O} (5) and {[Cd 2(SB)2(4,4′-bipy)4(H2O) 3]n·3nH2O} (6) are obtained (H 2SB = 4-sulfobenzoic acid), in which the SB2- dianion is in situ oxidized from H2L. Complex 5 is a 3-D host-guest supramolecular network by regarding the SB2- dianions as guest counteranions. In contrast, the adjacent Cd(ii) cations in complex 6 are bridged by the 4,4′-bipy to generate a 1-D zig-zag chain, in which the SB 2- dianion acts in chelating mode of carboxylate. The structure analyses of these complexes indicate that the coordination ability obeys the following sequence: sulfinate group > carboxyl group > sulfonate group. Moreover, the solid-state luminescent properties of these complexes are also investigated at room temperature.
Sulfinic Acids and Related Compounds 23. Preparation of Sulfinic Acids by the Reaction of Sulfonyl Halides with Thiols
Lee, Chew,Field, Lamar
, p. 391 - 397 (2007/10/02)
The reaction of arene- and alkanesulfonyl halides with p-thiocresol in the presence of triethylamine at -76 deg C gives triethylammonium sulfinates, which after acidification afford sulfinic acids of 95 - 100 percent purity in yields of 51 - 92 percent for 18 typical representatives.The synthesis succeeds in certain instances where conventional reduction with aqueous sodium sulfite fails and in other instances often is superior.The method is rapid, mild, selective, convenient, and general, although a few limitations are reported.Characterizations of the sulfinic acids are effected by titration with aqueous sodium nitrite, by IR and 1H-NMR spectra, by preparation of either a S-benzylthiuronium salt or a p-nitrobenzyl ester and either by elemental analyses or comparison with reported melting points of the acids and derivatives as appropriate.
