Bromido(eta(5)-carboxycyclopentadienyl)dinitrosylchromium(0) and (eta(5)-benzoylcyclopentadienyl)bromidodinitrosylchromium(0).

In the structures of each of the title compounds, [CrBr(C(6)H(5)O(2))(NO)(2)], (I), and [CrBr(C(12)H(9)O)(NO)(2)], (II), one of the nitrosyl groups is located at a site away from the exocyclic carbonyl C atom of the cyclopentadienyl (Cp) ring, with twist angles of 174.5 (3) and 172.5 (1) degrees.