220821-76-1

Basic information

• Product Name: dicarbonyl(η(5)-cyclopentadienyl)([2,4,6-tri(tert-butyl)-phenyl](chloro)-λ(4)-phosphanediyl)molybdenum(II)
• CAS NO: 220821-76-1
• Molecular Weight: 528.911
• Mol File: 220821-76-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: dicarbonyl(η(5)-cyclopentadienyl)([2,4,6-tri(tert-butyl)-phenyl](chloro)-λ(4)-phosphanediyl)molybdenum(II)(CAS DataBase Reference)
• NIST Chemistry Reference: dicarbonyl(η(5)-cyclopentadienyl)([2,4,6-tri(tert-butyl)-phenyl](chloro)-λ(4)-phosphanediyl)molybdenum(II)(220821-76-1)
• EPA Substance Registry System: dicarbonyl(η(5)-cyclopentadienyl)([2,4,6-tri(tert-butyl)-phenyl](chloro)-λ(4)-phosphanediyl)molybdenum(II)(220821-76-1)

Safety Data

• Hazardous Substances Data: 220821-76-1(Hazardous Substances Data)

Upstream product

• 56-23-5 tetrachloromethane 
• 220821-72-7 dicarbonyl(η(5)-cyclopentadienyl)[2,4,6-tri(tert-butyl)-phenyl-λ(4)-phosphanediyl]molybdenum(II) 

Relevant articles and documents

Phosphenium complexes 30. Supermesitylphosphenium complexes of molybdenum and tungsten: Synthesis and exchange reactions involving the P-H bond

Deprotonation of the complex salts {Cp(OC)3[H2(2,4,6-tBu3-C6H 2)P]M}BF4 (M=Mo, W) (4a,b), obtained from [Cp(OC)3M]BF4 (2a,b) and (2,4,6-tBu3-C6H2)PH2 (3), yields the metallo-phosphanes Cp(OC)3M-P(H)(2,4,6-tBu3-C6H2) (5a,b). 5a,b are thermally decarbonylated to the PH-functionalized phosphenium complexes Cp(OC)2M=P(H)(2,4,6-tBu3-C6H2) (7a,b), which can also be obtained by the base-assisted dehydrohalogenation of the bifunctional complexes Cp(OC)2[H2(2,4,6-tBu3C6H 2)P]M-Cl (9a,b), prepared by a ligand exchange reaction from Cp(OC)3M-Cl (8a,b) and 3. The reaction of 7a,b with CCl4 affords the chloro-substituted phosphenium complex Cp(OC)2M=P(Cl)(2,4,6-tBu3-C6H2) (10a,b) via H/Cl exchange at the sp2-phosphorus. Substitution of the P-bonded hydrogen by a methyl group is achieved by in situ deprotonation of 7b and subsequent treatment with methyliodide, yielding the diorgano-phosphenium complex Cp(OC)2M=P(Me)(2,4,6-tBu3-C6H2) (11).