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• W2019950903 endingPage "2049" @default.
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• W2019950903 abstract "The new neutral PhSb(dmid) (dmid2- = 4,5-dithiolato-1,3-dithiol-2-one) complex has been synthesized upon reaction of deprotected 1,3,4,6-tetrathiapentalene-2,5-dione with dichlorophenylstibine. Single-crystal X-ray structure determination shows an original three-dimensional network in the solid state, via Sb- - -O and Sb- - -S secondary interactions, based on an octagonal “Sb4S4” motif. Not only PhSb(dmid) but also PhSb(dmit) (dmit2- = 4,5-dithiolato-1,3-dithiole-2-thione) reacts with a second 1 equiv of dithiolate to give a series of highly reactive dianionic complexes, unknown so far. One of these complexes, [Me4N]2[PhSb(dmid)2], was structurally characterized by single-crystal X-ray measurements. Both dithiolene ligands, lying in the equatorial plane of a distorted octahedron, are unsymmetrically coordinated, with two Sb−S distances much longer than the other two. These dianionic species reacted with 1 equiv of PhSbCl2 to give, unexpectedly, a series of Sb(V) [Ph2Sb(dithiolene)2]- complexes. The same compounds were obtained directly upon slow addition of 1 equiv of PhSbCl2 on the corresponding dithiolate suspensions. This demonstrates that dianionic [PhSbIII(dithiolene)2]2- species are key intermediates in the synthesis of [Ph2SbV(dithiolene)2]- salts. The single-crystal X-ray structure determination of the tetraethylammonium salts of [Ph2Sb(dmid)2]-, [Ph2Sb(dmit)2]-, and [Ph2Sb(dmid)(dmit)]- show a distorted-octahedral coordination geometry for the Sb center with a cis configuration of the phenyl groups. This is preserved also in solution, as established by 13C NMR. Using the same technique, combined with 1H NMR, in a scrambling experiment, a fast dithiolene exchange has been emphasized. In the case of the [Ph2Sb(dmid)2]- salt, two polymorphs, with different folding angles along the S- - -S hinge, were crystallized." @default.
• W2019950903 created "2016-06-24" @default.
• W2019950903 creator A5012187621 @default.
• W2019950903 creator A5063749323 @default.
• W2019950903 date "2003-04-18" @default.
• W2019950903 modified "2023-09-25" @default.
• W2019950903 title "Neutral and Dianionic Organoantimony(III) Dithiolene Complexes: Syntheses, X-ray Crystal Structures, and Unexpected Reactivity" @default.
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• W2019950903 doi "https://doi.org/10.1021/om030056c" @default.
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