In the fac-[RuCl (CO) (thf)] complex, the Ru has slightly distorted octahedral coordination geometry with the carbonyl ligands in a facial arrangement and the thf trans to one of the carbonyls. The dihedral angle between the least-squares plane of the thf and the least-squares plane through the four ligands cis to the thf is 90.56 (23)°. The torsion angles about the Ru - O(thf) bond indicate that the thf ring nearly bisects the angles between cis Cl and carbonyl ligands. 2 3 II II
