259269-18-6

Basic information

• Product Name: [WBr₂(CO)2(PPh₃)(norbornadiene)]
• CAS NO: 259269-18-6
• Molecular Weight: 754.11
• Mol File: 259269-18-6.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: [WBr₂(CO)2(PPh₃)(norbornadiene)](CAS DataBase Reference)
• NIST Chemistry Reference: [WBr₂(CO)2(PPh₃)(norbornadiene)](259269-18-6)
• EPA Substance Registry System: [WBr₂(CO)2(PPh₃)(norbornadiene)](259269-18-6)

Safety Data

• Hazardous Substances Data: 259269-18-6(Hazardous Substances Data)

Upstream product

• 93473-77-9 [WBr₂(CO)2(norbornadiene)] 
• 603-35-0 triphenylphosphine 

Relevant articles and documents

Syntheses and structures of six and seven-coordinate diene complexes of molybdenum and tungsten(II). The crystal and molecular structures of [WBr2(CO)2(PMePh2)(norbornadiene)] and [WBr2(CO)(NCCH=CH2)(norbornadiene)]

Reactions of [WI2(CO)3(NCMe)2] with norbornadiene (NBD) and 1,5-cycloctadiene (COD) give six-coordinate dicarbonyls [WI2(CO)2(NBD)] and [WI2(CO)2(COD)], respectively. The related dibromo complex [WBr2(CO)2(NBD)] reacts with tertiary phosphines L to give unstable seven-coordinate adducts [WBr2(CO)2(L)(NBD)] (L=PPh3, PMePh2, PEt3), which in the case of L=PMePh2 was shown to undergo CO loss to give the six-coordinate derivative [WBr2(CO)(PMePh2)(NBD)]. X-ray diffraction studies of [WBr2(CO)2(PMePh2)(NBD)] reveal a seven-coordinate structure (distorted pentagonal bipyramid) with the diene C=C bonds on the pentagonal plane lying approximately parallel to the W-CO axes. Reactions of [WBr2(CO)2(NBD)] with organonitriles NCR at room temperature afford CO substitution products (R=Me, Pri, Ph, C6H4Me-4, CH=CH2) directly with no evidence for seven-coordinate intermediates. [WBr2(CO)2(COD)] and acetonitrile similarly give [WBr2(CO)(NCMe)(COD)]. X-ray diffraction studies of [WBr2(CO)(NCCH=CH2)(NBD)] confirmed a distorted octahedral structure where the carbonyl lies trans to the acrylonitrile ligand.