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The mol­ecular structure of the title compound, [WCl 2 (NO) 2 (C 21 H 24 N 2 ) 2 ]·C 4 D 8 O, displays a distorted octa­hedral arrangement around the W atom with two  trans  1,3-bis­(2,4,6-trimethyl­phen­yl)imidazol-2-yl­idene (IMes) carbene ligands in axial positions. The four equatorial positions are occupied by nitrosyl and chloride ligands, which are  trans  to each other. The C carbene —W—C carbene  bond angle of 173.44 (18)° and the Cl—W—N nitros­yl  bond angles of 171.34 (11) and 171.32 (13)° deviate only slightly from linearity. The distortion comes from the nitrosyl and chloride ligands which are not fully coplanar since the two N atoms deviate from the WCl 2  plane by −0.279 (4) and 0.272 (4) Å, respectively. An inter­molecular C—H⋯O inter­action connects the organometallic mol­ecule and the tetra­hydro­furan- d8  solvent mol­ecule.

acta crystallographica. section e

Bis[1,3-bis(2,4,6-trimethylphenyl)-2,3-dihydro-1H-imidazol-2-ylidene]dichloridodinitrosyltungsten(II) tetrahydrofuran-d8monosolvate