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Dimethyloxonium and Methoxy Derivatives of nido-Carborane and Metal Complexes Thereof

1
A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., 119991 Moscow, Russia
2
Globalchempharm Company, Sadovo-Kurinskaya Str. 32-1, 123001 Moscow, Russia
3
Basic Department of Chemistry of Innovative Materials and Technologies, G.V. Plekhanov Russian University of Economics, 36 Stremyannyi Line, 117997 Moscow, Russia
*
Authors to whom correspondence should be addressed.
Inorganics 2019, 7(4), 46; https://doi.org/10.3390/inorganics7040046
Received: 27 February 2019 / Revised: 21 March 2019 / Accepted: 22 March 2019 / Published: 27 March 2019
(This article belongs to the Special Issue Metal Complexes Containing Boron Based Ligands)
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Abstract

9-Dimethyloxonium, 10-dimethyloxonium, 9-methoxy and 10-methoxy derivatives of nido-carborane (9-Me2O-7,8-C2B9H11, 10-Me2O-7,8-C2B9H11, [9-MeO-7,8-C2B9H11], and [10-MeO-7,8-C2B9H11], respectively) were prepared by the reaction of the parent nido-carborane [7,8-C2B9H12] with mercury(II) chloride in a mixture of benzene and dimethoxymethane. Reactions of the 9 and 10-dimethyloxonium derivatives with triethylamine, pyridine, and 3-methyl-6-nitro-1H-indazole result in their N-methylation with the formation of the corresponding salts with 9 and 10-methoxy-nido-carborane anions. The reaction of the symmetrical methoxy derivative [10-MeO-7,8-C2B9H11] with anhydrous FeCl2 in tetrahydrofuran in the presence of t-BuOK results in the corresponding paramagnetic iron bis(dicarbollide) complex [8,8′-(MeO)2-3,3′-Fe(1,2-C2B9H10)2], whereas the similar reactions of the asymmetrical methoxy derivative [9-MeO-7,8-C2B9H11] with FeCl2 and CoCl2 presumably produce the 4,7′-isomers [4,7′-(MeO)2-3,3′-M(1,2-C2B9H10)2] (M = Fe, Co) rather than a mixture of rac-4,7′- and meso-4,4′-isomers. View Full-Text
Keywords: nido-carborane; iron bis(dicarbollide); cobalt bis(dicarbollide); dimethyloxonium derivatives; methoxy derivatives; synthesis; properties nido-carborane; iron bis(dicarbollide); cobalt bis(dicarbollide); dimethyloxonium derivatives; methoxy derivatives; synthesis; properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Stogniy, M.Y.; Erokhina, S.A.; Kosenko, I.D.; Semioshkin, A.A.; Sivaev, I.B. Dimethyloxonium and Methoxy Derivatives of nido-Carborane and Metal Complexes Thereof. Inorganics 2019, 7, 46.

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