{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,17]],"date-time":"2026-01-17T01:31:33Z","timestamp":1768613493886,"version":"3.49.0"},"reference-count":144,"publisher":"Wiley","issue":"26","license":[{"start":{"date-parts":[[2009,5,15]],"date-time":"2009-05-15T00:00:00Z","timestamp":1242345600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2009,6,22]]},"abstract":"Abstract<\/jats:title>Pushing the limits of coordination chemistry<\/jats:bold>: The most weakly coordinated silver complexes of the very weakly coordinating solvents dichloromethane and liquid sulfur dioxide were prepared. Special techniques at low temperatures and the use of weakly coordinating anions allowed structural characterization of [Ag(OSO)][Al{OC(CF3<\/jats:sub>)3<\/jats:sub>}4<\/jats:sub>], [Ag(OSO)2\/2<\/jats:sub>][SbF6<\/jats:sub>], and [Ag(Cl2<\/jats:sub>CH2<\/jats:sub>)2<\/jats:sub>][SbF6<\/jats:sub>] (see figure). An investigation of the bonding shows that these complexes are mainly stabilized by electrostatic monopole\u2013dipole interactions.magnified image<\/jats:alt-text><\/jats:graphic><\/jats:boxed-text><\/jats:p>The synthetically useful solvent\u2010free silver(I) salt Ag[Al(pftb)4<\/jats:sub>] (pftb=\uf8ffOC(CF3<\/jats:sub>)3<\/jats:sub>) was prepared by metathesis reaction of Li[Al(pftb)4<\/jats:sub>] with Ag[SbF6<\/jats:sub>] in liquid SO2<\/jats:sub>. The solvated complexes [Ag(OSO)][Al(pftb)4<\/jats:sub>], [Ag(OSO)2\/2<\/jats:sub>][SbF6<\/jats:sub>], and [Ag(CH2<\/jats:sub>Cl2<\/jats:sub>)2<\/jats:sub>][SbF6<\/jats:sub>] were prepared and isolated by special techniques at low temperatures and structurally characterized by single\u2010crystal X\u2010ray diffraction. The SO2<\/jats:sub> complexes provide the first examples of coordination of the very weak Lewis base SO2<\/jats:sub> to silver(I). The SO2<\/jats:sub> molecule in [Ag(OSO)][Al(pftb)4<\/jats:sub>] is \u03b71<\/jats:sup>\u2010O coordinated to Ag+<\/jats:sup>, while the SO2<\/jats:sub> ligands in [Ag(OSO)2\/2<\/jats:sub>][SbF6<\/jats:sub>] bridge two Ag+<\/jats:sup> ions in an \u03b72<\/jats:sup>\u2010O,O\u2032 (trans<\/jats:italic>,trans<\/jats:italic>) manner. [Ag(CH2<\/jats:sub>Cl2<\/jats:sub>)2<\/jats:sub>][SbF6<\/jats:sub>] contains [Ag(CH2<\/jats:sub>Cl2<\/jats:sub>)2<\/jats:sub>]+<\/jats:sup> ions linked through [SbF6<\/jats:sub>]\u2212<\/jats:sup> ions to give a polymeric structure. The solid\u2010state silver(I) ion affinities (SIA) of SO2<\/jats:sub> and CH2<\/jats:sub>Cl2<\/jats:sub>, based on bond lengths and corresponding valence units in the corresponding complexes and tensimetric titrations of Ag[Al(pftb)4<\/jats:sub>] and Ag[SbF6<\/jats:sub>] with SO2<\/jats:sub> vapor, show that SO2<\/jats:sub> is a weaker ligand to Ag+<\/jats:sup> than the commonly used weakly coordinating solvent CH2<\/jats:sub>Cl2<\/jats:sub> and indicated that binding strength of SO2<\/jats:sub> to silver(I) in the silver(I) salts increases with increasing size of the corresponding counteranion ([Al(pftb)4<\/jats:sub>]\u2212<\/jats:sup>>[SbF6<\/jats:sub>]\u2212<\/jats:sup>). The experimental findings are in good agreement with theoretical gas\u2010phase ligand\u2010binding energies of [Ag(L)n<\/jats:italic><\/jats:sub>]+<\/jats:sup> (L=SO2<\/jats:sub>, CH2<\/jats:sub>Cl2<\/jats:sub>; n<\/jats:italic>=1, 2) and solid\u2010state enthalpies obtained from Born\u2013Fajans\u2013Haber cycles by using the volume\u2010based thermodynamics (VBT) approach. Bonding analysis (VB, NBO, MO) of [Ag(L)n<\/jats:italic><\/jats:sub>]+<\/jats:sup> suggests that these complexes are almost completely stabilized by electrostatic interaction, that is, monopole\u2013dipole interaction, with almost no covalent contribution by electron donation from the ligand orbitals into the vacant 5s orbital of Ag+<\/jats:sup>. All experimental findings and theoretical considerations demonstrate that SO2<\/jats:sub> is less covalently bound to Ag+<\/jats:sup> than CH2<\/jats:sub>Cl2<\/jats:sub> and support the thesis that SO2<\/jats:sub> is a polar but non\u2010coordinating solvent towards Ag+<\/jats:sup>.<\/jats:p>","DOI":"10.1002\/chem.200802498","type":"journal-article","created":{"date-parts":[[2009,5,15]],"date-time":"2009-05-15T08:10:40Z","timestamp":1242375040000},"page":"6504-6517","source":"Crossref","is-referenced-by-count":60,"title":["Silver(I) Complexes of the Weakly Coordinating Solvents SO2<\/sub> and CH2<\/sub>Cl2<\/sub>: Crystal Structures, Bonding, and Energetics of [Ag(OSO)][Al{OC(CF3<\/sub>)3<\/sub>}4<\/sub>], [Ag(OSO)2\/2<\/sub>][SbF6<\/sub>], and [Ag(CH2<\/sub>Cl2<\/sub>)2<\/sub>][SbF6<\/sub>]"],"prefix":"10.1002","volume":"15","author":[{"given":"Andreas","family":"Decken","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carsten","family":"Knapp","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Grigori\u2005B.","family":"Nikiforov","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jack","family":"Passmore","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.\u2005Mikko","family":"Rautiainen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xinping","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoqing","family":"Zeng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2009,6,16]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr00019a005"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/ar970230r"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.200300620"},{"key":"e_1_2_6_4_3","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200300620"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ccr.2005.10.023"},{"key":"e_1_2_6_6_2","unstructured":"\u00a0"},{"key":"e_1_2_6_7_2","first-page":"253","volume-title":"Non\u2010Aqueous Solvent Systems","author":"Waddington T. 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the metathesis reaction: M[SbF6]+Li[Al(pftb)4]\u2192Li[SbF6]+M[Al(pftb)4] (M=cation) the estimated lattice\u2010energy differences between ligand\u2010free salts Li[Al(pftb)4] and M[Al(pftb)4] are less than 10\u2005kJ\u2009mol\u22121. Thus the reaction enthalpy for this reaction \u0394HRaccording to Born\u2013Fajans\u2013Haber cycle can be simply estimated by \u0394HR\u2248\u0394LH(Li[SbF6])\u2212\u0394LH(M[SbF6]). For example for M=Cu+\u0394HRis estimated to be \u221220\u2005kJ\u2009mol\u22121 and Cu+has a larger ligand affinity than Ag+ which will make the formation of [Cu(L)][Al(pftb)4] more favourable than the formation of [Ag(L)][Al(pftb)4]."},{"key":"e_1_2_6_73_2","unstructured":"The contacts (in valence units [v.u.]) are defined ass=exp[(R0\u2212R)\/B] whereRis the experimental distance andR0andBare constants. 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