[Cr(N)(acac)2]: A simple chromium nitride complex and its reactivity towards late transition metals

A new simple chromium(V) nitride complex, Cr(N)(acac)2 (1) has been prepared by nitrogen atom transfer. X-ray crystallography shows a short Cr―N bond at 1.5564(11) Å and equatorial Cr―O distances in the range 1.9387(9)–1.9485(9) Å. 1 reacts as a π-backbonding ligand towards cis-Pt(dmso)Cl2 to form a heterometallic nitride-bridged dimer, [Cl2(dmso)Pt(μ-N)Cr(acac)2(H2O)] (2). 2 has a linear Cr―N―M bridge [172.33(12)°] and a short N―Pt distance at 1.9015(18) Å. Despite a longer Cr―N distance in 2 (1.6228(18) Å), solution EPR reveals a significantly increased 14N hyperfine coupling in 2 as compared to 1.