Synthesis, structure and magnetic behavior of five-coordinate bis(iminopyrrolyl) complexes of cobalt(II) containing PMe3 and THF ligands

Inorganic Chemistry
Sónia A CarabineiroJohn E Warren

Abstract

The new bis-iminopyrrolyl five-coordinate Co(II) complexes [Co(kappa (2) N, N'-NC 4H 3C(R)N-2,6- (i)Pr 2C 6H 3) 2(PMe 3)] (R = H 3a; Me 3b) were synthesized in high yields (ca. 80-90%), using THF and diethyl ether as solvents, respectively, by (a) treatment of CoCl 2(PMe 3) 2 with the corresponding iminopyrrolyl Na salts ( Ie or If) or (b) reaction of anhydrous CoCl 2 and PMe 3 with Ie or If. A third route was tested, involving the addition of excesses of PMe 3 to the complexes [Co(kappa (2) N, N'-NC 4H 3C(R)N-2,6- (i)Pr 2C 6H 3) 2] (R = H 1e; Me 1f), which was only successful for the synthesis of 3a, in lower yields (ca. 30%). The synthesis of 3b in THF was unfruitful because of the kinetic competition of the solvent, giving rise to mixtures of 1f and its coordinated THF adduct 4b. The synthesis of the new bis-iminopyrrolyl five-coordinate Co(II) complexes [Co(kappa (2) N, N'-NC 4H 3C(R)N-2,6- (i)Pr 2C 6H 3) 2(THF)] (R = H 4a; Me 4b) were carried out in high yields (ca. 80-90%) by the reaction of CoCl 2(THF) 1.5 with the corresponding iminopyrrolyl Na salt. All the compounds have been characterized by X-ray diffraction, with 3a and 3b showing axially compressed trigonal bipyramidal geometry (with the PMe 3 ligand lying on the ...Continue Reading

References

Jan 9, 2003·Chemical Reviews·Vernon C Gibson, Stefan K Spitzmesser
Aug 12, 2005·Chemical Reviews·Jacopo TomasiRoberto Cammi
Jul 27, 2006·Journal of the American Chemical Society·Polly L ArnoldJason B Love
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Citations

Jul 23, 2011·Inorganic Chemistry·Jaime A FloresKenneth G Caulton
Aug 6, 2013·Inorganic Chemistry·Nikolay P TsvetkovKenneth G Caulton
Nov 2, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Sébastien DevillersZineb Mekhalif
Oct 7, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·D SureshPedro T Gomes
Jan 13, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Clara S B GomesM Conceição Oliveira
Aug 6, 2011·Acta Crystallographica. Section C, Crystal Structure Communications·Clara S B GomesM Teresa Duarte
Aug 21, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Ana I RodriguesPedro T Gomes
Apr 1, 2021·Inorganic Chemistry·Jonghoon ChoiYunho Lee
Jul 4, 2009·The Journal of Physical Chemistry. a·V RajapandianV Subramanian

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