Category: 18583-60-3

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Enantiocontrolled Synthesis of Highly Functionalized Tropanes via [5+2] Cycloaddition to η3-Pyridinylmolybdenum π-Complexes, published in 2000-11-30, which mentions a compound: 18583-60-3, Name is Potassiumtris(1-pyrazolyl)borohydride, Molecular C9H10BKN6, COA of Formula: C9H10BKN6.

A chiral, non-racemic η3-pyridinyl scaffold participates in [5+2] cycloaddition with electron-deficient alkenes, an allene, and an alkyne to give η3-allylmolybdenum bicyclic adducts. The adducts can be demetalated, providing a convergent route to highly functionalized tropanes. High enantiocontrol can be achieved throughout the cycloaddition and demetalation sequence.

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Piperazine – Wikipedia,
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Rehder, Dieter; Gailus, Hartmut; Schmidt, Hauke published the article 《Dichloro(tetrahydrofuran-O)[tris(1-pyrazolyl-N2)borato]vanadium(III)》. Keywords: mol structure vanadium chloro THF pyrazolylborato; vanadium chloro THF pyrazolylborato preparation crystal structure.They researched the compound: Potassiumtris(1-pyrazolyl)borohydride( cas:18583-60-3 ).Synthetic Route of C9H10BKN6. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:18583-60-3) here.

The title compound is an analog of the unknown η5-CpVCl2 (Cp = cyclopentadienyl). The compound was prepared from VCl3(THF)3 and K[HB(pz)3], pz = pyrazolyl. Crystals are monoclinic, space group P21/n, with a 8.553(4), b 12.860(5), c 15.530(7) Å, and β 104.08(4)°; Z = 4, dc = 1.632; R = 0.057, Rw(F2) = 0.151 for 3819 reflections. The mol. adopts a structure comparable to the piano-stool arrangement of a half-sandwich complex.

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Safety of Potassiumtris(1-pyrazolyl)borohydride. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Potassiumtris(1-pyrazolyl)borohydride, is researched, Molecular C9H10BKN6, CAS is 18583-60-3, about Mono- and Trinuclear Aroyl Complexes of Iron: Crystal Structure of Hg[Fe{C(:O)C6H3Me2-2,6}(CO)3(PPh3)]2. Author is Anderson, Stephen; Hill, Anthony F.; White, Andrew J. P.; Williams, David J..

The reaction of [Fe(CO)5] with LiR (R = C6H3Me2-2,6) provides [Fe{C(OLi)R}(CO)4], which reacts with I2 or HgCl2 in the presence of PPh3 to provide resp. [Fe(η2-OCR)I(CO)2(PPh3)] or Hg[Fe{C(:O)R}(CO)3(PPh3)]2; the latter has been characterized by x-ray diffraction. The reaction of [Fe(η2-OCR)I(CO)2(PPh3)] with K[HB(pz)3] (pz = pyrazol-1-yl) leads to [Fe{C(:O)R}(CO)2{HB(pz)3}] which is converted thermally to [Fe{HB(pz)3}2].

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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Bagnall, K. W.; Edwards, J.; Heatley, F. researched the compound: Potassiumtris(1-pyrazolyl)borohydride( cas:18583-60-3 ).Computed Properties of C9H10BKN6.They published the article 《Uranium(IV) poly(pyrazol-1-yl)borate complexes – carbon-13 NMR spectra》 about this compound( cas:18583-60-3 ) in Transplutonium 1975, Proc. Int. Transplutionium Elem. Symp., 4th. Keywords: NMR carbon uranium pyrazolylborate; borate pyrazolyl uranium NMR. We’ll tell you more about this compound (cas:18583-60-3).

13C NMR spectra were obtained for K[HB(Pz)3], UCl2[HB(Pz)3]2 (I), U[HB(Pz)3]4 (II), and (η-C5H5)UCl2[HB(Pz)3] (III) (Pz = pyrazol-1-yl) and the assignments are discussed. Two distinct sets of C resonances were observed in the spectrum of I, the 2 sets being in the ratio 2:1, indicating that the [HB(Pz)3] ligand is bidentate in this complex. There are no large chem. shifts, consistent with the major contribution to proton shift being due to the pseudo-contact mechanism, which depends largely on distance. The spectrum of II can only be assigned in terms of 10-coordinate U, based on the presence of 2 tridentate and 2 bidentate [HB(Pz)3] groups in the mol. The spectrum of III did not show any very large chem. shifts assignable to pyrazole ring C. The 3 sharp resonances at 121.0, 126.0, and 130.6 ppm were assigned to the C atoms of the pyrazole rings of the tridentate pyrazolylborate ligand, and the broad feature centered ∼280 ppm is probably due to the 5 equivalent C atoms of the cyclopentadienyl ring.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Potassiumtris(1-pyrazolyl)borohydride(SMILESS: [BH-](N1N=CC=C1)(N2N=CC=C2)N3N=CC=C3.[K+],cas:18583-60-3) is researched.Quality Control of (S)-1-(Dimethylamino)propan-2-ol. The article 《Photoluminescence studies on europium-based scorpionate-complex》 in relation to this compound, is published in Inorganic Chemistry Communications. Let’s take a look at the latest research on this compound (cas:18583-60-3).

The neutral homoleptic Eu(III) complex Eu(Tp)3 (Tp = hydrotris(pyrazol-1-yl)borate) showed luminescence associated to f-f transitions if irradiated with near-UV radiation having wavelength <380 nm. In this species the most intense emission corresponds to the 5D0 → 7F4 transition, falling between 690 and 700 nm. The complex is stable towards oxygen, moisture and near-UV light. The energy levels of the coordinated ligands involved in the photoluminescence process were computed by applying computational methods and by carrying out luminescence measurements on the analogous Gd(III) complex. As far as I know, this compound(18583-60-3)Safety of Potassiumtris(1-pyrazolyl)borohydride can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Enantiocontrolled Synthesis of Highly Functionalized Tropanes via [5+2] Cycloaddition to η3-Pyridinylmolybdenum π-Complexes, published in 2000-11-30, which mentions a compound: 18583-60-3, Name is Potassiumtris(1-pyrazolyl)borohydride, Molecular C9H10BKN6, COA of Formula: C9H10BKN6.

A chiral, non-racemic η3-pyridinyl scaffold participates in [5+2] cycloaddition with electron-deficient alkenes, an allene, and an alkyne to give η3-allylmolybdenum bicyclic adducts. The adducts can be demetalated, providing a convergent route to highly functionalized tropanes. High enantiocontrol can be achieved throughout the cycloaddition and demetalation sequence.

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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

Rehder, Dieter; Gailus, Hartmut; Schmidt, Hauke published the article 《Dichloro(tetrahydrofuran-O)[tris(1-pyrazolyl-N2)borato]vanadium(III)》. Keywords: mol structure vanadium chloro THF pyrazolylborato; vanadium chloro THF pyrazolylborato preparation crystal structure.They researched the compound: Potassiumtris(1-pyrazolyl)borohydride( cas:18583-60-3 ).Synthetic Route of C9H10BKN6. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:18583-60-3) here.

The title compound is an analog of the unknown η5-CpVCl2 (Cp = cyclopentadienyl). The compound was prepared from VCl3(THF)3 and K[HB(pz)3], pz = pyrazolyl. Crystals are monoclinic, space group P21/n, with a 8.553(4), b 12.860(5), c 15.530(7) Å, and β 104.08(4)°; Z = 4, dc = 1.632; R = 0.057, Rw(F2) = 0.151 for 3819 reflections. The mol. adopts a structure comparable to the piano-stool arrangement of a half-sandwich complex.

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Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Potassiumtris(1-pyrazolyl)borohydride( cas:18583-60-3 ) is researched.HPLC of Formula: 18583-60-3.Canty, Allan J.; Fritsche, Steven D.; Jin, Hong; Patel, Jim; Skelton, Brian W.; White, Allan H. published the article 《Water and Protic Acids as Oxidants for Platinum(II): Diorgano(hydrido)platinum(IV) and Diorgano(hydroxo)platinum(IV) Chemistry, Including Structural Studies of Poly(pyrazol-1-yl)borate Complexes Pt(OH)R2{(pz)3BH} (R = Methyl, p-Tolyl) and Pt(OH)Me2{(pz)4B}·H2O》 about this compound( cas:18583-60-3 ) in Organometallics. Keywords: crystal structure platinum hydroxo pyrazolylborato organo; mol structure platinum hydroxo pyrazolylborato organo; water oxidation platinum aryl Me pyrazolylborato; oxidative addition platinum aryl Me pyrazolylborato; hydrido platinum pyrazolylborato organo preparation decomposition; platinum organo pyrazolylborato preparation structure oxidation; hydroxo platinum organo pyrazolylborato preparation structure; arene reductive elimination platinum aryl hydrido. Let’s learn more about this compound (cas:18583-60-3).

The tris(pyrazol-1-yl)borate complexes K[PtR2{(pz)3BH}] (R = Me (1), p-tolyl (2)) may be isolated on addition of K[(pz)3BH] to solutions of [PtR2(SEt2)]2. Complexes 1, 2, and [PtMe2{(pz)4B}]- react with HOAc to form PtHR2{(pz)3BH} (R = Me (3), p-tolyl (5)) and PtHMe2{(pz)4B} (4). The hydridoplatinum(IV) complexes decompose at ∼140 (3) and ∼85 (4)° in toluene-d8 and ∼90° (5) in nitrobenzene-d5 to form methane (3, 4) and toluene (5), where isolation of 5 provided the 1st opportunity to study the decomposition of aryl(hydrido)platinum(IV) complexes. The hydridoplatinum(IV) complexes are deprotonated on addition of aqueous NaOH in acetone-d6 to form 1, 2, and [PtMe2{(pz)4B}]-. The hydroxoplatinum(IV) complexes Pt(OH)R2{(pz)3BH} (R = Me (6), p-tolyl (8)) or Pt(OH)Me2{(pz)4B}·H2O (7) may be readily isolated in 45-82% yield upon oxidation of the Pt(II) anions 1, 2, or [PtMe2{(pz)4B}]- by H2O. The hydridoplatinum(IV) complexes 3-5 also react slowly with H2O in acetone-d6 to form H2 and complexes 6-8. [PtR2{(pz)3BH}]- undergo oxidative-addition reactions with iodomethane to form PtMeR2{(pz)3BH} (R = Me, p-tolyl). The octahedral hydroxoplatinum(IV) complexes 6-8 are the 1st examples of Pt(IV) complexes formed on oxidation by H2O to be characterized by x-ray crystallog. The complexes display Pt-O distances of 1.974(8)-1.996(6) Å, and the Pt-N bond distances reflect the relative trans influences of the hydroxo and Me groups. The aqua group in Pt(OH)Me2{(pz)4B}·H2O (7) is H bonded to the hydroxoplatinum(IV) group to form a centrosym. dimer, such that it is not possible to ascertain whether the coordination environment of Pt is [Pt(OH)···H2O]2 or [Pt(OH2)+···OH-]2, although the former is believed to be more likely.

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called New mode of ion size discrimination for Group 2 metals using poly(pyrazolyl)borate ligands. Control of stability and structure of chelate complexes by intraligand contact, published in 1993-05-19, which mentions a compound: 18583-60-3, Name is Potassiumtris(1-pyrazolyl)borohydride, Molecular C9H10BKN6, Safety of Potassiumtris(1-pyrazolyl)borohydride.

Selectivity of [HnB(pz)4-n]- (n = 0-2; pz = pyrazolyl ring) for Group 2 metal ions was studied by liquid-liquid extraction The dominant extracted species is [HnB(pz)4-4n]2M. Bidentate [H2B(pz)2]- is a weak extracting reagent for Be2+ and Mg2+. Hydrotris(pyrazolyl)borate extracts Be2+, Mg2+, and Ca2+ effectively, and Sr2+ to some extent. Although [B(pz)4]-, a potentially tridentate ligand similar to [HB(pz)3]-, extracts Be2+ and Mg2+, the extractability for Ca2+ drops drastically. The different selectivity of these ligands cannot be explained from basicity of the donor atoms. To explore the origin of the selectivity, x-ray crystal structures of the extracted species were determined Complexes of [HB(pz)3]2Mg (1), [HB(pz)3]2Ca (2), and [B(pz)4]2Mg(3) have distorted octahedral geometries with each ligand having tridentate coordination. In the complex [B(pz)4]2Be (4), the ligands are bidentate and the geometry about the Be atom is distorted tetrahedral. The extracted species of Be2+ with [HB(pz)3]- changes from [HB(pz)3]2Be to [(HB(pz)3)BdOH]3 (5) as the initial concentration of Be2+ increases at 10-4-10-2 M. Complex 5 consists of bidentate [HB(pz)3]- and a cyclic [BeOH]33+ moiety which is the dominant species of Be in aqueous solution (pH 5). The 1H NMR spectra show that solution structures of these complexes in CDCl3 are similar to the structure in solid state. Examination of the dimensions of the complexes revealed that the stability and structure of poly(pyrazolyl)borate complexes of Group 2 metals are controlled by intraligand contact between pyrazolyl rings bonded to the central B atom. This is a novel model of ion size discrimination by chelating ligands.

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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Alcock, Nathaniel W.; Hill, Anthony F.; Melling, Richard P. researched the compound: Potassiumtris(1-pyrazolyl)borohydride( cas:18583-60-3 ).Electric Literature of C9H10BKN6.They published the article 《Polyazolyl chelate chemistry. 3. (σ-Organyl)[tris(pyrazol-1-yl)borato]ruthenium complexes》 about this compound( cas:18583-60-3 ) in Organometallics. Keywords: crystal structure pyrazolylborate ruthenium phenylethynylstyryl; mol structure pyrazolylborato ruthenium phenylethynylstyryl; vinylruthenium chloride complex substitution pyrazolylborate. We’ll tell you more about this compound (cas:18583-60-3).

The reactions of K[HB(pz)3] (pz = pyrazol-1-yl) with the coordinatively unsaturated σ-vinyl complexes [Ru(CR:CHR)Cl(CO)(PPh3)2] (R = H, Me, Ph) proceed with loss of a chloride and a phosphine ligand to provide the compounds [Ru(CR:CHR)(CO)(PPh3){HB(pz)3}] in high yield. Similar treatment of the complex [Ru(C6H4Me-4)Cl(CO)(PPh2)2] leads to the related σ-aryl derivatives [Ru(C6H4Me-4)(CO)(PPh3){HB(pz)3}]. The α-(phenylethynyl)-trans-β-styryl complex [Ru{C(CCPh):CHPh}(CO)(PPh3){HB(pz)3}] is obtained in high yield via the successive treatment of [RuClH(CO)(PPh3)3] with 1,4-diphenyl-1,3-butadiyne and K[HB(pz)3]. The mol. structure of [Ru{C(CCPh):CHPh](CO)(PPh3){HB(pz)3}], determined by x-ray diffraction, can be described as pseudooctahedral with 2 enantiomeric forms in the same asym. unit. The vinyl ligand is almost coplanar with the carbonyl ligand aligned in such a way as to maximize π-retrodative interactions.

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