“…More recently, Xin, Zhu and co-workers also reported that the reduction of a U(IV) azide complex, supported by the (NNP 2 ) 2− ligand ( 5a ), with excess KC 8 under N 2 generates the trinuclear imido–nitride complex, [K 2 ((U(NNP 2 ) 2 (μ-NH) 3 (μ-N))] ( 5 ) (bottom, Scheme 3). 69 The molecular structure of 5 consists of three uranium centers that are bridged by three imido (NH) ligands, and one nitride (N 3− ) ligand with U–N nitride bond lengths which range from 2.204 to 2.218 Å. These distances are comparable to those reported for the U( iv )/U( vi ) tetranitride cluster 1 , and slightly longer than those found in the nitride bridged cluster, [(U IV Cp*(μ-I) 2 ) 3 (μ-N)], reported by Evans and co-workers (2.138(3)–2.157(3) Å).…”