Staggered to Eclipsed Conformational Rearrangement of [Co2(CO)6(PPh3)2] in the Solid State: An X-ray Diffraction Study at High Pressure and Low Temperature

Authors

  • Nicola Casati,

    1. Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università degli Studi di Milano and Istituto di Scienze e Tecnologie Molecolari del CNR (ISTM-CNR), Via Venezian 21, 20133 Milan, Italy, Fax: (+39) 025-031-4454
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  • Piero Macchi Dr.,

    1. Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università degli Studi di Milano and Istituto di Scienze e Tecnologie Molecolari del CNR (ISTM-CNR), Via Venezian 21, 20133 Milan, Italy, Fax: (+39) 025-031-4454
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  • Angelo Sironi Prof.

    1. Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università degli Studi di Milano and Istituto di Scienze e Tecnologie Molecolari del CNR (ISTM-CNR), Via Venezian 21, 20133 Milan, Italy, Fax: (+39) 025-031-4454
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  • We thank Prof. Bruni for the use of the spectrometer to perform the high-pressure measurements.

Abstract

original image

Under pressure: characterization of the high-pressure phase of crystalline [Co2(CO)6(PPh3)2] has provided the first structural evidence for the transformation from a staggered to eclipsed arrangement of the equatorial carbonyl ligands in a dimeric transition-metal complex (see picture). A comparison with the same phenomenon observed at low temperature (though arrested in the very early stages) is presented.

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