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X‐ray Structure of the Isodiazomethane Complex Cr(CO) 5 C≡N‐NH 2 and [3+2]‐Cycloadditions to the Metallo‐Nitrile‐Imine [Cr(CO) 5 C≡N‐NH] – [1]
Author(s) -
Fehlhammer Wolf Peter,
Schoder Friedrich,
Weinberger Bernd,
Stolzenberg Heribert,
Beck Wolfgang
Publication year - 2009
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200900085
Subject(s) - nitrile , deprotonation , chemistry , imine , ligand (biochemistry) , cycloaddition , isocyanate , medicinal chemistry , carbon disulfide , stereochemistry , crystallography , ion , polymer chemistry , organic chemistry , catalysis , biochemistry , receptor , polyurethane
The structure of [Cr(CO) 5 CNNH 2 ] ( 1a ) containing Eugen Müller’s “isodiazomethane” as a ligand has been determined by X‐ray diffraction. In its deprotonated form 1a acts as a 1,3‐dipole of the (metallo) nitrile imine type, i.e., undergoes [3+2]‐cycloaddition reactions with acetylenes (MeO 2 CC≡CCO 2 Me), trifluoroacetonitrile,carbon disulfide and isocyanate (PhNCO). The new 16‐electron ligand [C≡N–NH] – is isoelectronic with isocyanomethanide [C≡N–CH 2 ] – and the fulminate anion [C≡N–O] – . Further relations and derivations within these classes of compounds are discussed.