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, Safety of 1,4,7,10,13-Pentaoxacyclopentadecane
The cationic titanium fluoride containing complexes [fac-TiF 3(MeCN)3][SbF6]·MeCN (1), [trans-TiF 2(15-Crown-5)][SbF6]2 (2) and [trans-TiF 2(18-Crown-6)][SbF6]2 (3), were prepared by the reaction of TiF4, the molecular ligand and SbF5 in MeCN. Complexes 1-3 were characterized by X-ray single crystal analysis, elemental analysis, IR, NMR and mass spectroscopy. Titanium tetrafluoride reacts with the SbF5 in SO2 with the formation of fac-[TiF3(SO2)3]+, detected by 19F NMR. Application of the volume-based approach to thermodynamics (VBT) offers a means, for the first time, of exploring the energetics surrounding these materials and in the thermodynamic section a discussion of this new approach is provided. It emerges that the basis of the thermodynamic driving force of formation of [TiF3L3][SbF6](s) salts, that enforces the unfavourable [DeltaH = + 237 (±20) kJ mol-1] fluoride ion transfer from the Lewis acid TiF4(s) to SbF5(l) to give the hypothetical [TiF3] +[SbF6]- (s), is the higher Ti-L (L = ligand) bond energy in the cationic complexes [TiF3L3] + as compared to that in the molecular adducts TiF4L 2(s) and SbF5L(s) so giving rise to larger enthalpies of complexation of [TiF3]+(g) by 3L(g) compared to those for complexation of TiF4(g) by 2L(g) and SbF5(g) by 1L(g). Formation of the trans-[TiF2(15-Crown-5)]2+ and trans-[TiF2(18-Crown-6)]2+ is accounted for the stabilization of [TiF2]2+ cation by the five donor acceptor Ti-O contacts and the accompanying positive charge delocalization. Cationic titanium(IV) complexes fac-[TiF3(MeCN)3-nL n]+ (n = 0-3) and cis-[TiF3(18-Crown-6)] +, trans-[TiF2(Crown)]2+ (Crown = 15-Crown-5 and 18-Crown-6) were obtained in MeCN solution by the reaction of fac-[TiF 3(MeCN)3]+ and L = Et2O, THF, H 2O or crown ethers. Complexes fac-[TiF3(MeCN) 3-nLn][SbF6] L = Et2O, THF, H 2O, crown ethers are unstable in MeCN solution and slowly decompose giving molecular complexes cis-TiF4L2, cis-TiF 4 (Crown), SbF5L, titanium oxofluoride and alkoxide complexes. The structure of the fac-[TiF3(MeCN)3] + is similar to the fac-[TiCl3(MeCN)3] + and the complexes trans-[TiF2L]2+ L = 15-Crown-5, 18-Crown-6 have very similar geometries to that of trans-[TiCl 2(15-Crown-5)]+ showing that the essential features of coordination are the same for the cationic titanium chloride and fluoride complexes with MeCN and 15-Crown-5, 18-Crown-6. The Royal Society of Chemistry 2005.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Safety of 1,4,7,10,13-Pentaoxacyclopentadecane. In my other articles, you can also check out more blogs about 33100-27-5