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Transamination of di(pyrid-2-yl)amine (1) with B(NMe2) 3 leads to the isomeric heterocyclic bis(dimethylamino)boryl compound 4 and not to bis(diniethylamino)di(pyrid-2-yl)arninoborane (2). B(NMe 2)3 reacts with aniline (1:2 ratio) to yield a 1:1 mixture of B(NHPh)3 and (Me2N)2BNHPh. Transamination of this mixture with 1 yields the anihnodimethylamino analogue of 4 (compound 7). Compound 4 reacts with CHCl3 to generate the boronium salt 5 by the abstraction of HCl from CHCl3 and addition of HCl to one of the dimethylamino groups. Compound 5 crystallizes with 4 molecules of CHCl 3. Compound 4 is attacked by AlCl3 in toluene to give a mixture of unidentified products from which the tetrachloroaluminate of a new type of spirocyclic diboronium cation, 8, was isolated and characterized by X-ray crystallography. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

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In the [Cu(C10H9N3)2][BF4] 2 (1) complex, the Cu(II) ion is in a compressed tetrahedral environment of four N atoms from two di-2-pyridylamine ligands, with an average Cu-N distance of 1.962(7) A; the dihedral angle between the N-Cu-N planes of the two ligands is 55.0(2). The asymmetric unit of [Cu(C10H9N3)2(H2O) 2][SO4]¡¤7H2O (2) contains two units of one-half [Cu(C10H9N3)2] moieties (the other half is inversion related), one sulfate and nine water molecules. Each Cu(II) ion involves the elongated rhombic octahedral CuN4O2 chromophore, and is surrounded by four N atoms from the two inversion related dpyam ligands, with an average Cu-N distance of 2.019(2) A. The axial positions of Cu(1) are occupied by the centrosymmetrically related O atoms of the two water molecules at 2.496(3) A, giving it a tetragonally distorted Cu(1)N4O2 octahedron. Similarly, the inversion related water oxygens at 2.465(3) A give a Cu(2)N4O2 chromophore. The electronic and ESR spectra of 1 and 2 are consistent with the compressed tetrahedral and the elongated rhombic octahedral stereochemistries, respectively, as reported for other related complexes.

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The replacement of the iodide ligands in the complex [PtI2(dpa)] (1) (dpa is 2,2?-dipyridylamine) by silver triflate in acetonitrile afforded the compound [Pt(dpa)(MeCN)2](SO3CF 3)2 (2). Homoleptic complexes [Pt(dpa)2](X) 2 (3¡¤(X)2) were synthesized by the treatment of [PtI2(dpa)] (1) with 2,2?-dipyridylamine in the presence of silver salts AgX in methanol (X = NO3) or acetonitrile (X = SO 3CF3). The deprotonation of the complex [3](SO 3CF3)2 to give the homoleptic complex [Pt(dpa-H)2] (4) was performed by two methods, e.g., by the treatment of [3](SO3CF3)2 with 2 equiv. of NaOH in methanol or by the addition of excess Et3N to a suspension of [3](SO3CF3)2 in methanol. The structures of compounds 1-4 were established by elemental analyses, high resolution electrospray ionization mass spectrometry, IR and NMR spectroscopy; the crystal structure of complexes [2](SO3CF3)2, [3](NO3)2¡¤H2O, [3](SO3CF 3)2¡¤2H2O, and 4 were determined by single-crystal X-ray diffraction.

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Tetrahydropyran – Wikipedia,
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The search for new molecular materials with interesting magnetic properties, using the pseudohalide azide ion and di-2-pyridylamine (dpa, C10H9N3) as a chelating ligand, led to the synthesis and structure determination of the title compound, [Co(N3)2(dpa)2]2SO4-2H2O. The crystal structure comprises discrete [Co(dpa)2(N3)2]+ cations, sulfate anions, as well as H2O solvent molecules. The CoIII cations display a slightly distorted octahedral coordination sphere defined by two N atoms from azide anions and four N atoms from the pyridyl rings of two dpa ligands. In the crystal, extensive C-H ? O, N-H ? O, and O-H ? O interactions result in supramolecular sheets that lie parallel to the ab plane. The sheets are further linked through O-H ? N interactions between the water molecules of one sheet and azide anions of another sheet, forming a supramolecular framework.

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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, belongs to Tetrahydropyrans compound, is a common compound. In a patnet, once mentioned the new application about 499-40-1, HPLC of Formula: C12H22O11

The novel title coordination polymer, {[Cu(C8H4O 4)(C10H9N3)]¡¤H 2O}n, synthesized by the slow-diffusion method, takes the form of one-dimensional zigzag chains built up of CuII cations linked by benzene-1,3-dicarboxyl-ate (ipht) anions. An exceptional characteristic of this structure is that it belongs to a small group of metal-organic polymers where ipht is coordinated as a bridging tridentate ligand with monodentate and chelate coordination of individual carboxyl-ate groups. The CuII cation has a highly distorted square-pyramidal geometry formed by three O atoms from two ipht anions and two N atoms from a di-2-pyridyl-amine (dipya) ligand. The zigzag chains, which run along the b axis, further construct a three-dimensional metal-organic framework via strong face-to-face pi-pi inter-actions and hydrogen bonds. A solvent water mol-ecule is linked to the different carboxyl-ate groups via hydrogen bonds. Thermogravimetric and differential scanning calorimetric analyses confirm the strong hydrogen bonding.

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Tetrahydropyran – Wikipedia,
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The VO2+-atp and VO2+-tp (tp=triphosphate) systems were studied by potentiometry and X-band e.s.r. spectroscopy in the pH ranges 2.5-5.2 and 2.5-6.5 respectively.The systems were investigated in the presence of 0.1 mol dm-3 NaClO4 at 25.0+/- deg C in the ligand-metal molar ratio range 3-1.5.Analysis of the data reveals that VO2+ is able to form stable species with both ligands.The logbeta values revelant to the 1:1 complexes are 6.67+/-0.02 and 9.87+/-0.02 for atp and tp respectively.Species <(VO)(atp)>2-, <(VO)(atp)2>6-, and <(VO)2(atp)> were found in all the mixtures investigated.The complex <(VO)2(atp)> has a logbeta value equal to 10.21+/-0.02; VO2+-tp species with a 2:1 molar ratio were not found in the mixtures investigated.A structure in which the VO2+ ion interacts just with the triphosphate chain is proposed for the complex <(VO)(atp)>2- while metal co-ordination to the phosphate chain and to the ribose hydroxyl group is suggested for <(VO)2(atp)>.Solid <(VO)2(atp)> was isolated from aqueous solutions containing VO2+ and atp in a 2:1 molar ratio at pH 2.5.An oxygen only co-ordination mode for the metal cation was determined from spectroscopic data.A solid compound containing VO2+, atp, and bipyam in a 1:1:1 molar ratio was also isolated from acidic aqueous solution.

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The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.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, name: (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

Reaction of 2-aminopyridine 1-oxide 1a with2-fluoropyridine 5a in DMF at 140C gave 2-(2-pyridylamino)pyridine 1-oxide 6 (41%) along with bis(2-pyridyl)amine 7 (5%). However, heating in melt of 1a with 2-chloropyridine 5b or 2-bromopyridine 5c in the presence of dry potassium carbonate at 175C provided 3-(2-pyridylamino)-2(1H)-pyridone 9 as cine substitution product. Compound 9 results from the nucleophilic attack of the N-oxide on the carbon atom bearing halogen to give corresponding cation 17, which rearranges to cine substitution product 9 via anhydro-base 18.

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Tetrahydropyran – Wikipedia,
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The design of molecule-based systems with tuneable optical and/or magnetic properties has attracted considerable attention because of their potential applications in high-performance molecule-based electronic devices, switches, sensors and displays. In this regard, a large number of valence tautomeric tetraoxolene-bridged dinuclear cobalt complexes with tetradentate ancillary ligands have been reported, but none of these complexes contained a bidentate terminal ligand. In order to increase the scope in this field, the present report describes the synthesis, structures, electrochemical and magnetic studies of two dinuclear cobalt-tetraoxolene complexes, [Co2(dhbq)(bpy)4](PF6)3 (1(PF6)3) and [Co2(dhbq)(bpa)4](PF6)3¡¤6H2O (2(PF6)3¡¤6H2O), where H2dhbq is 2,5-dihydroxy-1,4-benzoquinone, with the bidentate terminal ligands 2,2?-bipyridine (bpy) and 2,2?-bipyridyl amine (bpa), respectively. An X-ray diffraction study reveals that the dianionic form of the redox active tetraoxolene ligand bridges the metal centers in these complexes, and one metal center is in the high spin cobalt(II) state while the other one is in the low spin cobalt(III) state. The present report will increase knowledge on the synthesis of such systems using bidentate terminal ligands. Variable temperature magnetic susceptibility measurements show no indication for valence tautomerism (VT) in either complex. Further attempts could be made to synthesize similar complexes from different solvents and/or using different counter ions to check whether such variations can bring VT in these systems.

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The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.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

The crystal structures of two mono(dpyam)copper(II) complexes, [Cu(dpyam)(NO2)2] (1) and [Cu(dpyam)(H2O)2(SO4)] (2) and two dithiocyanate compounds containing bis(dpyam)copper(II) units, [Cu(dpyam)2(NCS)](SCN)¡¤0.5DMSO (3) and [Cu(d- pyam)2(SCN)2] (4) have been determined by X-ray crystallography. The second orthorhombic form of the monomeric Cu(II) complex 1 was obtained by the reaction of di-2-pyridylamine (dpyam) with CuCl and NaNO2 in water-methanol solution. Each copper(II) ion in 1 exhibits a tetrahedrally-distorted square base of the CuN2O2 chromophore, with off-the-z-axis coordinated nitrito groups weakly bound in approximately axial positions. Complex 2 is an example of a polymeric copper(II) derivative containing the bidentate bridging sulfate ligand in the long-bonded axial positions. Each copper(II) ion in 2 shows an elongated tetragonal octahedral stereochemistry. The CuN4N? chromophore of 3 involves a square-based pyramidal structure, slightly distorted towards a trigonal bipyramidal stereochemistry, tau = 0.13. One of the SCN- anions is bonded to the copper(II) ion via the N atom in the axial position of the square pyramid. Complex 4 is centrosymmetric and octahedrally elongated, with the SCN- anions coordinating in axial positions via the S atom. The structures of complexes 1-4 and their ESR and electronic reflectance spectra are compared with those of related complexes.

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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 Patent£¬once mentioned of 499-40-1, category: Tetrahydropyrans

The present invention provides novel compounds and ligands that are useful in transition metal catalyzed cross-coupling reactions. For example, the compounds and ligands of the present invention are useful in palladium or gold catalyzed cross-coupling reactions.

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Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics