Cabelof, Alyssa C.; Erny, Alec M.; Carta, Veronica; Pink, Maren; Caulton, Kenneth G. published the artcile< Anion metathesis and chlorination of late transition metal pincer complexes: Comparing Co, Rh and Zn>, Synthetic Route of 128-09-6, the main research area is crystal structure transition metal pincer complex preparation; phosphino pyrazole pyridine tridentate pincer transition metal complex.
The ability of (PNNH)CoCl2 (where PNNH is a phosphino and pyrazole substituted pyridine pincer) to serve as a precursor to coordinate the weak anion nitrate is investigated, giving a product with two coordinated nitrates, which demonstrate remarkable variability of nitrate binding in an overall six coordinate divalent cobalt complex. A synthetic variant with only one chloride per Co(II) is characterized, and retains coordination number 5. Comparison is made to rhodium, initially in oxidation state +1, including a carbonyl reporter ligand. The tridentate pincer displaces chloride and PPh3 from Rh(PPh3)2(CO)Cl to form the salt [(PNNH)Rh(CO)]Cl. That compound reacts with N-chloro succinimide with oxidation to trivalent rhodium, loss of carbon monoxide, but also with inadvertent chlorine substitution of pyrazole ring CH bond. As a comparison standard for PNNH ligand with a redox inert metal, (PNNH)ZnCl2 is characterized; bond lengths within the ligand allow the conclusion that the iron and cobalt analogs show no major back donation into the pincer ligand.
Inorganica Chimica Acta published new progress about Crystal structure. 128-09-6 belongs to class chlorides-buliding-blocks, and the molecular formula is C4H4ClNO2, Synthetic Route of 128-09-6.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics