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. 585-88-6, Name is Maltitol, molecular formula is C12H24O11. In an article, author is Guo, Zhifang,once mentioned of 585-88-6, SDS of cas: 585-88-6.
Widely contrasting outcomes from the use of tris(pentafluorophenyl)bismuth or pentafluorophenylsilver as oxidants in the reactions of lanthanoid metals with N,N ‘-diarylformamidines
Reactions of lanthanoid metals with tris(pentafluorophenyl)bismuth or pentafluorophenylsilver and two widely disparate formamidines, N,N’-bis(2,6-difluorophenyl)formamidine (DFFormH) and N,N’-bis(2,6-diisopropylphenyl)formamidine (DippFormH) have been investigated as possible redox transmetallation/protolysis (RTP) syntheses of lanthanoid formamidinates. Thus, (Ln(DFForm)(3)(thf)) (Ln = Lu, 1, Yb, 2, Tm, 3, Er, 4, Ho, 5, Dy, 6; thf = tetrahydrofuran), [Ln(DFForm)(3)(thf)(2)] (Ln = Tb, 7, Gd, 8, Sm, 9, Nd, 10), and (Yb(DippForm)(2)(thf)(2)]center dot 2thf (11) complexes were obtained from an excess of lanthanoid metals, [Bi(C6F5)(3)]center dot 0.5diox (diox = 1,4-dioxane) and the appropriate formamidine. Reaction of neodymium and [Bi(C6F5)(3)]center dot 0.5diox with the bulkier DippFormH in thf resulted in C-F activation and formation of (Nd(DippForm)(2)F(thf)(2)] (12) and o-HC6F4O(CH2)(4)N(Dipp)CH=N(Dipp) (Dipp = 2,6-di-isopropylphenyl). Although the reaction of erbium and [Bi(C6F5)(3)]center dot 0.5diox with DippFormH was not complete after one week (by 19F NMR), use of [Hg(C6F5)(2)] instead of [Bi(C6F5)(3)]center dot 0.5diox resulted in C-F activation and formation of [Er(DippForm)(2)F(thf)) (13) and o-HC6F4O(CH2)(4)N(Dipp)CH=N(Dipp) in two days. Attempted RTP reactions between lanthanoid metals, AgC6F5 and DFFormH in thf gave [Ag-2(DFForm)(2)]center dot 3thf (14), except in the case of ytterbium. All other lanthanoid metals required activation by 12 (2%) before lanthanoid complex formation could be achieved. From these reactions, lanthanoid formamidinates, [Ln(DFForm)(2)(solv)I] (Ln = Lu, 15, Tm, 16, Er, 17, Tb, 18, Gd, 19), (Ln(DFForm)(3)(py)] = Er, 17a, Tb, 18a; py = pyridine), and (Nd(DFForm)(3)(thf)(2)]center dot thf (10) were obtained. Where two types of lanthanoid formamidinates [Ln(DFForm)(3)(pY)] and [Ln(DFForm)(2)(solv)I] were obtained from the Ln metals activated by 12, they could not be separated on preparative scale. From Yb, the peroxide-bridged complex, [Yb-2(DippForm)(2)(O-2)(2)(py)(4)] (20) was surprisingly isolated. Thus [Bi(C6F5)(3)]center dot 0.5diox has potential as an oxidative replacement for diarylmercurials in RTP syntheses of lanthanoid formamidinates but [AgC6F5(py)] does not.
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Reference:
Tetrahydropyran – Wikipedia,
,Tetrahydropyran – an overview | ScienceDirect Topics