Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology. 1679-64-7, Name is 4-(Methoxycarbonyl)benzoic acid, molecular formula is , belongs to phthalazine compound. In a document, author is Appleby, Kate M., Application In Synthesis of 4-(Methoxycarbonyl)benzoic acid.
The reaction of [Ir(IMes)(COD)Cl], [IMes = 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene, COD = 1,5-cyclooctadiene] with pyridazine (pdz) and phthalazine (phth) results in the formation of [Ir(COD)(IMes)(pdz)]Cl and [Ir(COD)(IMes)(phth)]Cl. These two complexes are shown by nuclear magnetic resonance (NMR) studies to undergo a haptotropic shift which interchanges pairs of protons within the bound ligands. When these complexes are exposed to hydrogen, they react to form [Ir(H)(2)(COD)(IMes)(pdz)]Cl and [Ir(H)(2)(COD)(IMes)(phth)]Cl, respectively, which ultimately convert to [Ir(H)(2)(IMes)(pdz)(3)]Cl and [Ir(H)(2)(IMes)(phth)(3)] Cl, as the COD is hydrogenated to form cyclooctane. These two dihydride complexes are shown, by NMR, to undergo both full N-heterocycle dissociation and a haptotropic shift, the rates of which are affected by both steric interactions and free ligand pK(a) values. The use of these complexes as catalysts in the transfer of polarisation from para-hydrogen to pyridazine and phthalazine via signal amplification by reversible exchange (SABRE) is explored. The possible future use of drugs which contain pyridazine and phthalazine motifs as in vivo or clinical magnetic resonance imaging probes is demonstrated; a range of NMR and phantom-based MRI measurements are reported.
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1679-64-7, in my other articles. Application In Synthesis of 4-(Methoxycarbonyl)benzoic acid.
Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem