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Molecules 2014, 19(6), 7094-7103; doi:10.3390/molecules19067094
Article

An Unusual Conversion of Paramagnetic [3-Cl-3,3,8-{Ph2P(CH2)nPPh-µ-(C6H4-ortho)}-1,2-(CH3)2-closo-3,1,2-RuIIIC2B9H8] (n = 3 and 4) to Form the First 18-Electron P-Phenylene ortho-Cycloboronated closo-Ruthenacarboranes with a Dioxygen Ligand

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A.N. Nesmeyanov Institute of Organoelement Compounds of the RAS, 28 Vavilov Street, 119991 Moscow, Russia
* Author to whom correspondence should be addressed.
Received: 21 April 2014 / Revised: 16 May 2014 / Accepted: 22 May 2014 / Published: 30 May 2014
(This article belongs to the Special Issue Ruthenium Complex)
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Abstract

Treatment of [3-Cl-3,3,8-[Ph2P(CH2)nPPh-µ-(C6H4-ortho)]-1,2-Me2-closo-3,1,2-RuIIIC2B9H8] (1, n = 3; 2, n = 4) with an excess of KOH in a 1:1 benzene/methanol mixture at room temperature in air affords new dioxygen closo-ruthenacarborane complexes [3-(η2-O2)-3,3,8-[Ph2P(CH2)nPPh-µ-(C6H4-ortho)]-1,2-Me2-closo-3,1,2-RuIIIC2B9H8] (3, n = 3) and (4, n = 4) in 42.5% and 45.8% yield respectively. The structures of dioxygen complexes 3 and 4 were established by single-crystal X-ray diffraction. The IR and multinuclear NMR data [1H, 13C{1H}, 31P{1H} and 11B{1H}] along with 2D HSQC correlation spectra for the new dioxygen closo-ruthenacarboranes are discussed.
Keywords: ruthenacarboranes; oxygen-type ligands; NMR-spectra; X-ray diffraction ruthenacarboranes; oxygen-type ligands; NMR-spectra; X-ray diffraction
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Kostukovich, A.Y.; D'yachihin, D.I.; Dolgushin, F.M.; Smol'yakov, A.F.; Godovikov, I.A.; Chizhevsky, I.T. An Unusual Conversion of Paramagnetic [3-Cl-3,3,8-{Ph2P(CH2)nPPh-µ-(C6H4-ortho)}-1,2-(CH3)2-closo-3,1,2-RuIIIC2B9H8] (n = 3 and 4) to Form the First 18-Electron P-Phenylene ortho-Cycloboronated closo-Ruthenacarboranes with a Dioxygen Ligand. Molecules 2014, 19, 7094-7103.

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