Fixation of Metallo Nitrile Ylides and Metallo Nitrile Imines as Ligands in Transition Metal Complexes [1]

1,3‐Dipoles of the type metallo nitrile ylide and metallo nitrile imine were prepared by mono‐ α ‐deprotonation of CH‐acidic {[W(CO) 5 CHCH 2 PPh 3 ]PF 6 , M (CO) 5 CNCH 2 CO 2 R ( M = Cr, W; R = Me, Et), [Pt(Cl)(CNCH 2 CO 2 Et)(PPh 3 ) 2 ]BF 4 } and NH‐acidic isocyanide complexes (Cr(CO) 5 CNNH 2 ) and were stabilized by coordination to a second transition metal complex fragment {Cr(CO) 5 , [ M (CO) 5 ] + ( M = Mn, Re), [FeCp(CO) 2 ] + , [Pt(Cl)(P R 3 ) 2 ] + ( R = Et, Ph)}. All dinuclear products 1 – 7 , 10 , and 11 are neutral species except [(Ph 3 P) 2 (Cl)Pt{ μ 2 ‐CNCH(CO 2 Et)}Pt(Cl)(PPh 3 ) 2 ]BF 4 ( 8 ). Complex (OC) 5 W{ μ 2 ‐CNCH(CO 2 Et)}Pt(Cl)(PEt 3 ) 2 ( 5b ) was characterized by X‐ray diffraction. Twofold deprotonation/platination to give (OC) 5 Cr{ μ 3 ‐CNC(Ph)}[Pt(Cl)(PPh 3 ) 2 ] 2 ( 9 ) was achieved in the case of Cr(CO) 5 CNCH 2 Ph.