Fischer, Ernst Otto published the artcileAromatic complexes of metals. XXII. Thiophenechromiumtricarbonyl, Recommanded Product: 2-Methyl-4-phenylbutanoic acid, the publication is Chemische Berichte (1958), 2395-9, database is CAplus.
Cr-(CO)6 (I) and thiophene (II) heated in a sealed tube gave II. Cr(CO)3 (III) and 3 equivalents CO. The diamagnetic III, which is in the crystalline state fairly stable in air, demonstrates for the 1st time also that aromatic heterocycles are capable of binding transition metals centrally through their ¦Ð-electron sextet. I (2.2 g.) and 40 cc. pure II heated 5-7 hrs. in a sealed tube under N at 205-10¡ã, cooled, filtered under N, and evaporated in vacuo, the deep orange-red, crystalline residue dissolved in a few cc. 1:1 C6H6-petr. ether, and chromatographed on Al2O3, a yellow zone washed out, the orange-red zone eluted with C6H6, the deep orange-red eluate evaporated, and the residue sublimed in vacuo at 85-95¡ã yielded 60-75 mg. III, red crystals. The molar magnetic susceptibilities of III at 293 and 90¡ãK. were -168 and -163 ¡Á 10-6 cu. cm./mole, resp.
Chemische Berichte published new progress about 1949-41-3. 1949-41-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene, name is 2-Methyl-4-phenylbutanoic acid, and the molecular formula is C11H14O2, Recommanded Product: 2-Methyl-4-phenylbutanoic acid.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia