One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 319-03-9, Name is 5-Fluoroisobenzofuran-1,3-dione, formurla is C8H3FO3. In a document, author is Habarurema, Gratien, introducing its new discovery. COA of Formula: C8H3FO3.
Coordination mode of cyclohex-1-enylolonium cation and bridging pyridyl derivatives as gem-diol chelates to rhenium(I) and (VII)
Rhenium(I) and (VII) complexes with cyclohex-1-enylolonium cation and bridging pyridyl derivatives are reported. Additionally, the CO-bridged pyridyl and their related compounds have shown interesting behaviour in their reactivity towards compounds containing two amino groups. The unusual cationic compound: (2,6-diaza-cyclohex-1-enylolonium)2-aza-benzoate (H(2)den), was isolated from the reaction mixture of 1,2-di(pyridin-2-yl)ethane-1,2-dione with propane-1,3-diamine in methanol. The latter ligand: H(2)den, was used in the synthesis of rhenium(I) complex in its reaction with [Re(CO)(5)Cl] that gave rise to novel rhenium(I) complex fac-[Re(CO)(3)(Hhdm)] (1). The surprising aspect in the formation of (1) is the modification of H(2)den which was stabilized into a coordinated six-membered pyrimidine ring, 1,4,5,6-tetrahydropyrimidin-2-yl)di(pyridin-2-yl)methanol (H(2)hdm) chelate. The derived ligand acts as a tridentate monoanionic N-2,O-donor ligand towards the fac-[Re(CO)(3)](+) core. Surprisingly, the 2-aza-benzoate counter-ion that was present in the used ligand is not displayed in the crystal structure of complex 1, and might have been stabilized into 2-aza-benzoic acid (picolinic acid). The reaction of the potential tridentate N-2,O-donor ligand 2,2 ‘-dipyridylketone (dpk) with trans-[ReOI2(OEt)(PPh3)(2)] led to the isolation of [ReO3(dpk center dot OH)] (2). The ligand H(2)den and the rhenium complexes were spectroscopically characterized, and the structures of H(2)den, 1 and 2 were established by X-ray diffraction.
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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem