On March 15, 1989, Hill, William E.; Islam, Mohammed Q.; Webb, Thomas R.; McAuliffe, Charles A. published an article.Recommanded Product: (6-Bromohexyl)triphenylphosphonium bromide The title of the article was Solution studies of gold(I) complexes of n-hexyldimethylphosphine, n-butyldiphenylphosphine, 1-dimethylphosphino-6-diphenylphosphinohexane, 1,6-bis(dimethylphosphino)hexane and 1,6-bis(diphenylphosphino)hexane. And the article contained the following:
The 31P{1H} NMR spectra of the monodentate phosphines (L = PMe2(C6H13) (L1) and PPh2Bu (L2)) in the presence of Et4N[AuBr2] in CDCl3 solution were studied at various L:Au ratios and temperatures At 195 K and a P:Au ratio = 1, only [BrAuL] is present. Increasing the amount of phosphine leads to [BrAuL2], [AuL3]Br and [AuL4]Br. When AuBr2-, L1 and L2 are mixed in a 1:1:1 ratio [BrAuL1], [BrAuL12], [BrAuL2], [BrAuL22] and [BrAuL1L2] are present. Addition of more L1 causes the disappearance of [BrAuL1] with formation of [BrAuL12]; however this does not occur for L2 when [BrAuL2] is still present even at a Au:L1:L2 ratio of 1:1:2. Employing the unsym. Ph2P(CH2)6PMe2 (L3) gives [BrAuL3AuBr], 3-coordinate (BrAuL32AuBr] (2 forms) and 3-coordinate AuL3Br. Similar studies for the sym. Ph2P(CH2)6PPh2 (dph) and Me2P(CH2)6PMe2 are reported. The rate constants for the exchange BrAuL1 ⇌ BrAuL12, BrAuL2 ⇌ BrAuL12 and BrAu(dph)AuBr ⇌ BrAu(dph)2AuBr were determined from the 31P〈1H〉 NMR spectra. Activation parameters were calculated by a least-squares method. The activation entropies for the exchange processes range from -1.1 to 13.9 cal(mol deg)-1 depending on the ligand type. An associative mechanism is more probable although the possibility of a dissociative process cannot be ruled out. An improved synthetic method is reported for unsym. bisphosphines with chain length > (CH2)4. The experimental process involved the reaction of (6-Bromohexyl)triphenylphosphonium bromide(cas: 83152-22-1).Recommanded Product: (6-Bromohexyl)triphenylphosphonium bromide
The Article related to kinetics exchange gold bromo phosphine, phosphine substitution gold bromo complex, Inorganic Chemicals and Reactions: Reactions (Nonpreparative) and other aspects.Recommanded Product: (6-Bromohexyl)triphenylphosphonium bromide
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary