Studies on the Reactivity of [Ge9]4− towards [Fe(cot)(CO)3]: Synthesis and Characterization of [Ge8Fe(CO)3]3− and of the Anionic Organometallic Species [Fe(cot)(CO)3]− |
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| Authors: | Binbin Zhou Dr Jose M Goicoechea |
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| Institution: | Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Mansfield Road, Oxford, OX1 3TA (UK), Fax: (+44)?1865‐272690 |
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| Abstract: | Reaction of cyclooctatetraene (COT) iron(II) tricarbonyl, Fe(cot)(CO)3], with one equivalent of K4Ge9 in ethylenediamine (en) yielded the cluster anion Ge8Fe(CO)3]3? which was crystallographically‐characterized as a K(2,2,2‐crypt)]+ salt in K(2,2,2‐crypt)]3Ge8Fe(CO)3]. The chemically‐reduced organometallic species Fe(η3‐C8H8)(CO)3]? was also isolated as a side‐product from this reaction as K(2,2,2‐crypt)]Fe(η3‐C8H8)(CO)3]. Both species were further characterized by EPR and IR spectroscopy and electrospray mass spectrometry. The Ge8Fe(CO)3]3? cluster anion represents an unprecedented functionalized germanium Zintl anion in which the nine‐atom precursor cluster has lost a vertex, which has been replaced by a transition‐metal moiety. |
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| Keywords: | germanium iron metal carbonyls metal clusters organometallic radical anions Zintl anions |
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