Dinitrogen reduction chemistry with scandium provides a complex with two side-on (N[double bond, length as m-dash]N) ligands bound to one metal: (CMe)Sc[(µ-η:η-N)Sc(CMe)].

Although there are few reduced dinitrogen complexes of scandium, this metal has revealed a new structural type in reductive dinitrogen chemistry by reduction of bis(pentamethylcyclopentadienyl) scandium halides under N. Reduction of (Cp* = CMe) with potassium graphite (KC) under dinitrogen generates the dark blue paramagnetic complex , 1. This end-on bridging (N[double bond, length as m-dash]N) complex is a diradical with a magnetic moment of 2.

The Scandium(II) Carbonyl Complex (CHBu)Sc(CO) and Its Isocyanide Analog (CHBu)Sc(CNCHMe-2,6).

Treatment of the scandium(II) metallocene CpSc (Cp = CHBu) with CO or the isocyanide CNXyl (Xyl = CHMe-2,6) yields the carbonyl complex CpSc(CO), , or the isocyanide complex CpSc(CNXyl), , which were identified by X-ray crystallography. Isotopic labeling with CO shows the CO stretch of at 1875 cm shifts to 1838 cm in . The CN stretch in is shifted to 1939 cm compared to 2118 cm for the free isocyanide.