622853-41-2

Upstream product

• 827336-47-0 δ-[(1,4-bis(diphenylphosphino)-1,2,3,4-tetramethyl-1,3-butadiene)platinum((S)-BINOL)] 
• 348582-89-8 1,4-bis(diphenylphosphino)-1,2,3,4-tetramethyl-1,3-butadiene 
• 18531-99-2 1,1’-bi-2-naphthol 
• 1000811-23-3 dichloro[1,4-bis(diphenylphosphino)-1,2,3,4-tetramethyl-1,3-butadiene]platinum 

Downstream Products

• 827336-47-0 λ-[(1,4-bis(diphenylphosphino)-1,2,3,4-tetramethyl-1,3-butadiene)platinum((S)-BINOL)] 
• 827337-24-6 λ-[(1,4-bis(diphenylphosphino)-1,2,3,4-tetramethyl-1,3-butadiene)Pt(triflato)2] 
• 753459-05-1 λ-[(1,4-bis(diphenylphosphino)-1,2,3,4-tetramethyl-1,3-butadiene)Pt(hexafluoroantimonato)2] 
• 827336-52-7 λ-[(1,4-bis(diphenylphosphino)-1,2,3,4-tetramethyl-1,3-butadiene)Pt(OTf)2] 
• 622853-55-8 λ-[(1,4-bis(diphenylphosphino)-1,2,3,4-tetramethyl-1,3-butadiene)PtCl2] 

Relevant academic research and scientific papers

Comparative study of diastereoisomer interconversion in chiral BINOL-ate and diamine platinum complexes of conformationally flexible NUPHOS diphosphines

A thorough and detailed study of diastereointerconversion in the chiral platinum complexes [(NUPHOS)Pt{(S)-BINOL}] (3a-e) has been undertaken and compared with the results of a similar study with [(BIPHEP)Pt{(S)-BINOL}]. Rate data revealed that this process obeys first-order relaxation kinetics, and rate constants for conversion of the minor to the major diastereoisomer have been obtained. Eyring analysis of the data gave ΔH? and ΔS? values of 22-25 kcal mol-1 and -1 to -16 eu, respectively. In combination with computational analysis, these studies indicate that atropinversion most likely occurs via an on-metal pathway involving a planar seven-membered transition state. Substitution of (S)-BINOL for (S,S)-DPEN results in a marked reduction in the barrier to atropinversion; a ΔH? value of 17 kcal mol-1 has been determined for the conversion of δ-[(Ph4-NUPHOS)Pt{(S,S)-DPEN}]-Cl2 to λ-[(Ph4-NUPHOS)Pt{(S,S)-DPEN}]Cl2, which could indicate that an alternative mechanism operates.