An Electrophilic, Intramolecularly Base-Stabilized Platinum–Antimony Complex
An Electrophilic, Intramolecularly Base-Stabilized Platinum–Antimony Complex
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亲电、分子内碱稳定的铂-锑络合物
DOI:
10.1021/acs.organomet.1c00371
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发表时间:
2021
期刊:
影响因子:
2.8
通讯作者:
Gabbaï, François P.
中科院分区:
文献类型:
--
作者:
Smith, Jesse E.;Yang, Haifeng;Gabbaï, François P.
As part of our interest in the chemistry of late transition metal complexes bearing cationic antimony ligands, we have investigated the reaction of ((o-(Ph2P)C6H4)3)SbClPtCl (1) with H2O2and found that it affords [((o-(Ph2P)C6H4)2(o-Ph2PO)C6H4)SbPtCl]+([2–Cl]+), a monocationic complex with the newly installed P=O moiety coordinated intramolecularly to the antimony atom via a P=O → Sb dative bond. The Pt–Cl bond of this complex is readily activated by addition of a ligand such as cyclohexyl isocyanide. When carried out in the presence of AgBF4, this reaction affords the dicationic complex [((o-(Ph2P)C6H4)2(o-Ph2PO)C6H4)SbPt(CNCy)]+([2–CNCy]2+). In addition to structurally characterizing [2–Cl]+and [2–CNCy]2+as their chloride and tetrafluoroborate salts, respectively, we have also studied the reaction of [2–Cl]+with AgBF4in the presence of PhCCH as a substrate surrogate. When monitored by31P NMR spectroscopy in CDCl3, this reaction shows the formation of a new species tentatively assigned to [((o-(Ph2P)C6H4)2(o-Ph2PO)C6H4)SbPt]2+([2]2+) stabilized by coordination of the alkyne. This formulation is supported by the elevated carbophilic reactivity of [2]2+, which readily catalyzes the cyclization of 2-allyl-2-(2-propynyl)malonate. Altogether, these results show that the accumulation of charge in such reactive complexes can be facilitated by the intramolecular base-stabilization of the dinuclear core.
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影响因子:
15
作者:
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通讯作者:
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影响因子:
2.8
作者:
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通讯作者:
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影响因子:
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作者:
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影响因子:
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作者:
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