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. 499-40-1, Name is (2R,3S,4R,5R)-2,3,4,5-Tetrahydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexanal, molecular formula is C12H22O11. In a Article，once mentioned of 499-40-1, category: Tetrahydropyrans
Crown-linked dipyridylamino-triazine ligands and their spin-crossover iron(ii) derivatives: Magnetism, photomagnetism and cooperativity
The syntheses, crystallography and magnetic properties of a series of compounds of formula trans-[FeII(L1)2(NCX) 2] (X = S, Se, BH3 (1-3)), cis-[FeII(L 2)(NCX)2]·CH2Cl2 (X = S, Se, BH3 (4-6)) and trans-[FeII(L3)(NCX) 2]n (X = S, Se (7-8)) are described (L1 = 6-chloro-N2,N2-diethyl-N4,N4- di(pyridin-2-yl)-1,3,5-triazine-2,4-diamine, L2 = 6,6?-(1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-7,16-diyl)bis(N 2,N2-diethyl-N4,N4-di(pyridin-2-yl)- 1,3,5-triazine-2,4-diamine, L3 = 6,6?-(1,4,10,13-tetraoxa-7,16- diazacyclooctadecane-7,16-diyl)bis(N2,N2,N 4,N4-tetra(pyridin-2-yl)-1,3,5-triazine-2,4-diamine)). The magnetostructural properties of 1-8 have been probed in detail by variable temperature magnetic measurements and crystallographic methods. 1-6 display mononuclear structures while 7 and 8 form 1-D chain structures. Complexes 4-6 have the potential to form 1D-chains via L2 bridging, but instead form mononuclear complexes. Magnetic studies show that complexes 1, 2, and 4 remain in the high-spin (HS) state at all temperatures. An aged, dry, powdered sample of 3 gives an abrupt HS to LS transition (T1/2 = 200 K), while a freshly prepared, powdered sample of 3·1.5H2O displays thermal hysteresis (Delta = 7 K). Complexes 5, 6 and 7 undergo a gradual spin transition with T1/2 values of 100 K, 150 K and 130 K, respectively. Cooperativity parameters are compared, with 3 showing cooperativity (positive C) and 5 and 6 showing anticooperativity. Photomagnetic LIESST (light induced excited spin state trapping) studies were performed on complexes 5 and 6 and reveal T(LIESST) values lower than 60 K. An attempt has been made to understand the electronic structure of complex 3 and its cooperativity behaviour using density functional methods, the calculations reproducing the sign and, in part, the magnitude of the cooperativity.
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.category: Tetrahydropyrans, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 499-40-1, in my other articles.
Reference：
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics