Jump to main content
Jump to site search

Issue 29, 2014
Previous Article Next Article

4-Nitrophenyl- and 4′-nitro-1,1′-biphenyl-4-carboxylates attached to Mo2 quadruple bonds: ground versus excited state M2δ–ligand conjugation

Author affiliations

Abstract

From the reactions between Mo2(TiPB)4, where TiPB = 2,4,6-triisopropylbenzoate and two equivalents of the carboxylic acid LH (LH = 4-nitrobenzoic acid and 4′-nitro[1,1′-biphenyl]-4-carboxylic acid) the compounds trans-M2(TiPB)2L2 have been prepared: I (L = 4-nitrobenzoate and M = Mo), II (L = 4′-nitro-1,1′-biphenylcarboxylate and M = Mo) and III (L = 4-nitrobenzoate and M2 = MoW). The compounds have been characterized by 1H NMR, UV-Vis and steady state emission spectroscopy, ns and fs transient absorption spectroscopy and cyclic voltammetry. These data are compared with predictions based on electronic structure calculations on model compounds where TiPB is substituted for formate. Together these data indicate stronger ground-state coupling of the Mo2δ and ligand π* systems in I relative to II but this order is reversed in the photo excited S11MLCT state. Attempts to prepare the W2 containing analogs were unsuccessful.

Graphical abstract: 4-Nitrophenyl- and 4′-nitro-1,1′-biphenyl-4-carboxylates attached to Mo2 quadruple bonds: ground versus excited state M2δ–ligand conjugation

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Apr 2014, accepted on 04 Jun 2014 and first published on 16 Jun 2014


Article type: Paper
DOI: 10.1039/C4DT01073F
Citation: Dalton Trans., 2014,43, 11397-11403
  •   Request permissions

    4-Nitrophenyl- and 4′-nitro-1,1′-biphenyl-4-carboxylates attached to Mo2 quadruple bonds: ground versus excited state M2δ–ligand conjugation

    B. G. Alberding, M. H. Chisholm, C. B. Durr, J. C. Gallucci, Y. Ghosh and T. F. Spilker, Dalton Trans., 2014, 43, 11397
    DOI: 10.1039/C4DT01073F

Search articles by author

Spotlight

Advertisements