A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane, molecular formula is C10H20O5. In a Article£¬once mentioned of 33100-27-5, SDS of cas: 33100-27-5
Synthesis of diamidopyrrolyl molybdenum complexes relevant to reduction of dinitrogen to ammonia
A potentially useful trianionic ligand for the reduction of dinitrogen catalytically by molybdenum complexes is one in which one of the arms in a [(RNCH2CH2)3N]3- ligand is replaced by a 2-mesitylpyrrolyl-alpha-methyl arm, that is, [(RNCH2CH 2)2NCH2(2-MesitylPyrrolyl)]3- (R = C6F5, 3,5-Me2C6H3, or 3,5-t-Bu2C6H3). Compounds have been prepared that contain the ligand in which R = C6F5 ([C 6F5N)2Pyr]3-); they include [(C 6F5N)2Pyr]Mo(NMe2), [(C 6F5N)2Pyr]MoCl, [(C6F 5N)2Pyr]MoOTf, and [(C6F5N) 2Pyr]MoN. Compounds that contain the ligand in which R = 3,5-t-Bu2C6H3 ([Art-BuN) 2Pyr]3-) include {[(Art-BuN) 2Pyr]Mo(N2)}Na(15-crown-5), {[(Art-BuN) 2Pyr]Mo(N2)}[NBu4], [(Art-BuN) 2Pyr]Mo(N2) (nuNN = 2012 cm-1 in C6D6), {[(Art-BuN)2Pyr]Mo(NH 3)}BPh4, and [(Art-BuN)2Pyr]Mo(CO). X-ray studies are reported for [(C6F5N) 2Pyr]Mo(NMe2), [(C6F5N) 2Pyr]MoCl, and [(Art-BuN)2Pyr]MoN. The [(Art-BuN)2Pyr]Mo(N2)0/- reversible couple is found at -1.96 V (in PhF versus Cp2Fe+/0), but the [(Art-BuN)2Pyr]Mo(N2)+/0 couple is irreversible. Reduction of {[(Art-BuN)2Pyr]Mo(NH 3)}BPh4 under Ar at approximately -1.68 V at a scan rate of 900 mV/s is not reversible. Ammonia in [(Art-BuN) 2Pyr]Mo(NH3) can be substituted for dinitrogen in about 2 h if 10 equiv of BPh3 are present to trap the ammonia that is released. [(Art-BuN)2Pyr]Mo-N=NH is a key intermediate in the proposed catalytic reduction of dinitrogen that could not be prepared. Dinitrogen exchange studies in [(Art-BuN)2Pyr]Mo(N 2) suggest that steric hindrance by the ligand may be insufficient to protect decomposition of [(Art-BuN)2Pyr]Mo-N =NH through a variety of pathways. Three attempts to reduce dinitrogen catalytically with [(Art-BuN)2Pyr]Mo(N) as a “catalyst” yielded an average of 1.02 ¡À 0.12 equiv of NH3.
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.SDS of cas: 33100-27-5, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 33100-27-5, in my other articles.
Reference£º
Chiral Catalysts,
Chiral catalysts – SlideShare