Mehrfachbindungen zwischen hauptgruppenelementen und übergangsmetallen: XVIII. Heterometallische selenido-komplexe |
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| Authors: | Wolfgang A Herrmann Jürgen Rohrmann Manfred L Ziegler Thomas Zahn |
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| Institution: | Lehrstuhl für Anorganische Chemie I. Anorganisch - chemisches Institut der Technischen Universität München, Lichtenbergstrasse 4, D-8046 Garching ü. München Deutschland;Anorganisch-chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 270, D-6900 Heidelberg 1 Deutschland |
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| Abstract: | The selenium bridge present in the iron complex (μ-Se)(η5-C5H5)Fe(CO)2]2 (1) exhibits nucleophilic character and is thus prone to addition reactions with electrophilic reagents. Treatment of 1 with the coordinatively unsaturated fragment (η5-C5H5)Mn(CO)2 results in formation of the heteronuclear complex (η5- C5H5)3Fe2MnSe(CO)6 (2) which contains a flattened pyramidal Fe2MnSe core, with the selenium atom occupying the top of position of this framework. No FeMn and FeFe bonds are present in this molecule (single crystal X-ray diffraction study). Compound 2 is very light-sensitive in solution, thus giving the derivative (η5-C5H5)3Fe2MnSe(CO)5(3). According to a crystal structure determination, this latter compound once again exhibits a pyramidal Fe2MnSe core but with the iron atoms directly connected with each other via a single bond (266.7(1) pm). |
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