The molecule [RuN3(C5H5){P(C6H5)3}2] has a typical three-legged-piano-
stool geometry; Ru-Cp0 (where Cp0 is the centre of the ring) is 1.843
(3) angstrom, the three legs are 2.3293 (5) and 2.3304 (5) (Ru-P) and
2.135 (3) angstrom (Ru-N) in length while the angles are P-Ru-P 105.22
(2), P-Ru-N 85.39 (6) and 86.65 (5)-degrees. The azide group is almos
t linear [N-N-N 175.2 (3)-degrees] and is coordinated to Ru with an Ru
-N-N angle of 124.5 (2)-degrees; there is a small difference between t
he N-N distances [1.186 (3) and 1.164 (3) angstrom], the longer being
adjacent to the Ru atom.