Journal of Chemical Crystallography

, Volume 43, Issue 7, pp 377–382 | Cite as

Carboxylato Molybdenum(V) Complexes: X-Ray Structures of the Dinuclear Pivalato Complexes

  • Barbara ModecEmail author
Original Paper


Mononuclear molybdenum(V) starting material, (PyH)5[MoOCl4(H2O)]3Cl2 (where PyH+ stands for pyridinium cation, C5H5NH+), reacted with triethylammonium or pyridinium salt of pivalic acid (dimethylpropanoic acid) to form two dinuclear molybdenum(V) compounds with the (PyH)2[Mo2O4Cl3(Py)(Piv)] (1) and (PyH)[Mo2O4Cl2(Py)2(Piv)]·CH3CN (2) (Py = pyridine, Piv = a deprotonated form of dimethylpropanoic acid) compositions. Compound 1 crystallized in the triclinic \( P{\bar1}\) space group with a = 9.52110(10) Å, b = 10.89790(10) Å, c = 14.5665(2) Å, α = 109.6310(6)°, β = 93.2646(7)° and γ = 111.8670(7)°. Compound 2 crystallized in the orthorhombic P nam space group with a = 10.67530(10) Å, b = 12.7801(2) Å and c = 20.1379(3) Å. X-ray structural analysis confirmed that the anions of both products consist of the central {Mo2O4}2+ core with the pivalato ligands coordinated to the sites which are trans to the terminal oxides. Because of a different pyridine/chloride content in the complex anions of 1 and 2, the metal–metal bond lengths also differ.

Graphical Abstract

Reaction of mononuclear molybdenum(V) starting material with pivalate resulted in (PyH)2[Mo2O4Cl3(Py)(Piv)] (1) and (PyH)[Mo2O4Cl2(Py)2(Piv)]·CH3CN (2) with the carboxylate coordinated as a bridging ligand to a pair of metal ions of the {Mo2O4}2+ core.


Crystal structures Molybdenum(V) coordination chemistry {Mo2O4}2+ core Carboxylato complexes Pivalato complexes 



This work was supported by a Grant from the Slovenian Ministry of Education, Science and Sport (Grant P1-0134).


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Department of Chemistry and Chemical TechnologyUniversity of LjubljanaLjubljanaSlovenia

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