85370-61-2

Upstream product

• 119-65-3 isoquinoline 
• 92670-28-5 (3,4-dimethylpyridinio)-N-phosphonate 
• 92670-26-3 (3,5-dimethylpyridinio)-N-phosphonate 
• 92670-25-2 (3-methylpyridinio)-N-phosphonate 
• 26322-04-3 (4-methylpyridinio)-N-phosphonate 

Downstream Products

• 119-65-3 isoquinoline 
• 26322-03-2 pyridinium-N-phosphonate 

Relevant academic research and scientific papers

Bonding in Phosphoryl (-PO32-) and Sulfuryl (-SO3-) Group Transfer between Nitrogen Nucleophiles as Determined from Rate Constants for Identity Reactions

Rate constants have been measured for the bimolecular reactions of pyridines with pyridinium-N-phosphonates (kyxp) and pyridinium-N-sulfonates (kyxs) for aqueous solution at 25 deg C and 0.1 M ionic strength.The Broensted correlations with the pK of the entering or leaving pyridine can be used to calculate the rate constants for reactions where entering and leaving pyridines are identical.The Broensted selectivities of the "identity" rate constants (βi=-0.53 for kxxp and βi=-55 for kxxs) predict tightness parameters (τ) of 0.35 and 0.56 and bond orders (η) of 0.17 and 0.28 for the N-P and N-S bonds in the transition states for the transfer processes.The data are consistent with first-order "Marcus" theory governing the energy surfaces of the reactions and in particular obey the relationship βi=βnuc+βlg predicted by Lewis and Hu.