Transition metal compounds containing the -OTeF5 and NTeF5 groups. |
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Authors: | P Huppmann D Lentz K Seppelt |
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Institution: | Anorganisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 270, 69 Heidelberg Germany |
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Abstract: | The electronegative ligand OTeF5 has been tested on the elements Ti, Mo, W, Ta, Re, Os and others. Compounds such as OMo(OTeF5)4, W(OTeF5)6, Ta(OTeF5)5, ReO2(OTeF5)3, OsO(OTeF5)4 are prepared. While ReVII could be stabilized with OTeF5, the highest oxidation state on Osmium is VI, and Iridium probably IV. OMo(OTeF5)4 shows a regular square pyramidal structure with apical double bonded oxygen. Chemistry on the ligand NTeF5 is based on the synthesis of H2NTeF5 and R3SiNHTeF51. Other new main group derivatives are so far Cl2NTeF5, HClNTeF5, OCN-TeF5, F3PNTeF5, Cl3NPTeF5, F2SNTeF5 and Cl2SeNTeF5, the first compound with a selenium-nitrogen double bond. In the transition metal series the compounds F4MoNTeF5 and Cl4WNTeF5 (in addition to the longer known polymeric (HgNTeF51) have been prepared. Both have discrete metal nitrogen double bonds. |
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