89189-76-4

Basic information

• Product Name: tris(t-butyl isocyanide)dichloro(phenylimido)tungsten(IV)
• CAS NO: 89189-76-4
• Molecular Weight: 595.268
• Mol File: 89189-76-4.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: tris(t-butyl isocyanide)dichloro(phenylimido)tungsten(IV)(CAS DataBase Reference)
• NIST Chemistry Reference: tris(t-butyl isocyanide)dichloro(phenylimido)tungsten(IV)(89189-76-4)
• EPA Substance Registry System: tris(t-butyl isocyanide)dichloro(phenylimido)tungsten(IV)(89189-76-4)

Safety Data

• Hazardous Substances Data: 89189-76-4(Hazardous Substances Data)

Upstream product

• 78409-02-6 phenylimido tungsten tetrachloride 
• 119072-55-8 tert-butylisonitrile 

Relevant articles and documents

Organoimido-complexes of Tungsten-(VI) -(V), and -(IV): Crystal and Molecular Structures of and .

Reaction of RNCO (R = Ph or Et) with WOCl4 gave the tungsten (VI) imido-compounds which, in further reactions gave (thf = tetrahydrofuran) and 3>.In the presence of phosphine ligands (L = PPh3 or PMe2Ph; L2 = Ph2PCH2CH2PPh2), in boiling benzene, reduction occured forming the paramagnetic tungsten (V) compounds 2>.More powerful reduction (sodium amalgam) in the presence of ligands (L = PMe3, PMe2Ph, and CNBut) gave the tungsten (IV) compounds 3>.Other reactions led to cleavage of the organoimido-group from the tungsten.An X-ray structure determination of showed the meridional configuration of chlorines with mutually trans-phosphines.The short W-N bond length (1.742 Angstroem) and practically linear WNC (172.3 degree) suggest that the imido-group is acting as a four electron ligand.Structure determination of shows that the three phosphines are meridional, and all cis to the W=-N-Ph unit.Although the imido-function seems to exert a small trans-lengthening influence on the relevant W-Cl bond in the trichloride, this effect does not seem to be present in the dichloride.