Korthals, Brigitte published the artcileNickel(II)-Methyl Complexes with Water-Soluble Ligands L [(salicylaldiminato-κ2N,O)NiMe(L)] and Their Catalytic Properties in Disperse Aqueous Systems, Application of Pyridine-3-sulfonic acid, the publication is Organometallics (2007), 26(6), 1311-1316, database is CAplus.
Neutral (salicylaldiminato)nickel(II) Me complexes [{6-C(H):NAr-2,4-I2C6H2O-κ2N,O}NiMe(L)] (Ar = 2,6-{3,5-(F3C)2C6H3}2C6H3) with different water-soluble ligands L (2a, L = 1,3,5-triaza-7-phosphaadamantane; 2b, L = hexamethylenetetramine (urotropine); 2c, L = tetraethylammonium pyridine-3-sulfonate; 2d, L = amino-terminated poly(ethylene glycol) monomethoxy ether) were prepared 2A–d are potentially water-soluble catalyst precursors for ethylene polymerization, which form a water-insoluble active site [{κ2-N,O}NiR(ethylene)] (R = growing chain). Only complex 2d was water-soluble (>2 mmol L-1); 2c is soluble in water/2-propanol mixtures In toluene as a reaction medium, only the relatively weakly coordinated tertiary amine complex 2b is polymerization active (1.7 × 104 TO). In aqueous systems 2c,d are also active due to compartmentalization of the active site in the polymer particles and of L in the aqueous phase. Polyethylene particle sizes vary from 18 nm (dispersions formed with 2d) to over 0.5 μm (2c) to suspensions (2b) depending on the initial state of the reaction mixture, correlated with catalyst solubility
Organometallics published new progress about 636-73-7. 636-73-7 belongs to pyridine-derivatives, auxiliary class Pyridine,Sulfonic acid, name is Pyridine-3-sulfonic acid, and the molecular formula is C5H5NO3S, Application of Pyridine-3-sulfonic acid.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem