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Issue 2, 2014
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Synthesis, characterization and reactivity of potassium and barium complexes containing phosphane–borane stabilized methanides

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Abstract

The polymeric potassium complex [K{CH(PPh2BH3)2}] (1) was prepared and used as a starting material for the syntheses of related N,N,N′,N′-tetramethylethylenediamine (tmeda) and N,N,N′,N′,N′′-pentamethyldiethylenetriamine (pmdta) ligated potassium derivatives [K{CH(PPh2BH3)2}(tmeda)2] (2) and [K{CH(PPh2BH3)2}(pmdta)]2 (3). Salt metathesis reactions with [BaI2(thf)5] allowed the synthesis of the barium derivatives [BaI{CH(PPh2BH3)2}(thf)5] (5) and [Ba{CH(PPh2BH3)2}2(solv)2}] (solv = Et2O, thf) (6), which are more prone to subsequent reactions than the potassium derivatives. One of the resulting products, [Ba4O{CH(PPh2BH3)2}3{Ph2PCH(BH3)PPh2BH3}3] (7), which contains two different isomeric forms of the bis(borane) adduct of Ph2PCHPPh2, was isolated. The complexes were characterized by NMR techniques and single crystal X-ray diffraction measurements.

Graphical abstract: Synthesis, characterization and reactivity of potassium and barium complexes containing phosphane–borane stabilized methanides

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Publication details

The article was received on 18 Aug 2013, accepted on 24 Sep 2013 and first published on 27 Sep 2013


Article type: Paper
DOI: 10.1039/C3DT52257A
Citation: Dalton Trans., 2014,43, 458-468
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    Synthesis, characterization and reactivity of potassium and barium complexes containing phosphane–borane stabilized methanides

    J. Langer and H. Görls, Dalton Trans., 2014, 43, 458
    DOI: 10.1039/C3DT52257A

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