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Phosphorescent complexes of {Mo6I8}4+ with triazolates: [2+3] cycloaddition of alkynes to [Mo6I8(N3)6]2–

Abstract

(Bu4N)2[Mo6I8(N3)6], prepared in a clean high-yield reaction from (Bu4N)2[Mo6I8(CH3COO)6] and Me3SiN3, underoges [3+2] cycloaddition with CH3O(O)C≡C(O)OCH3 with the formation of a novel hexakis(triazolate) complex, (Bu4N)2[Mo6I8(N3C2(COOCH3)2)6] with symmetrically coordinated 4,5-di(carbmethoxy)triazol-2-yl ligands. The product was characterized by X-ray analysis, NMR, IR and ESI-mass spectrometry. It undergoes a quasi reversible oxidation in CH3CN at E1/2 = 1.36 V (vs. Ag/AgCl) and is red-light emissive upon UV photoexcitation. Reaction with methylpropyolate also yields corresponding hexakis(triazolate) complex, [Mo6I8(N3C2H(COOCH3))6]2–, which exists as 1:1 mixture of two isomers. Alkynes that lacking strongly electron-withdrawing substituents, fail to undergo the cycloaddition reaction.

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Supplementary files

Article information


Submitted
24 Aug 2020
Accepted
06 Oct 2020
First published
06 Oct 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Phosphorescent complexes of {Mo6I8}4+ with triazolates: [2+3] cycloaddition of alkynes to [Mo6I8(N3)6]2–

M. N. Sokolov, K. Brylev, A. Gushchin, M. Maxim, T. S. Sukhikh and A. D. Mironova, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ04259E

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