Tag: M.W=100-200

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 5-(4-Pyridyl)-1H-tetrazole, is researched, Molecular C6H5N5, CAS is 14389-12-9, about Understanding the formation of metal-oxide based inorganic solids: Assessing the influence of tetrazole molecule.Computed Properties of C6H5N5.

The hydrothermal reaction of Cu(II) salt, ammonium heptamolybdate and 4-ptz (5-(4-pyridyl)tetrazole) at different synthetic conditions yields two compounds [Cu(4-Hptz)(Mo2O7)] (1) and [Cu(4-Hptz)2(H2O)3]2[Mo8O26] (2). Both the compounds 1 and 2 were characterized by routine elemental analyses, IR-, thermogravimetric studies and unambiguously characterized by single crystal x-ray crystallog. Compound 1 exhibits a 3-dimensional bimetallic oxide framework, constructed from the tetrazoles and {CuMo2O7} oxide phase. The coordination ability of N atoms in the tetrazole ring makes the ring acting as a template in the formation of {Cu4Mo6O10} rings, made up of [Mo2O7]2- anions and Cu(II) octahedra; the stacking of these {Cu4Mo6O10} rings along crystallog. c axis gave a 3-dimensional bimetallic oxide framework. Compound 2 consists of infinite octamolybdate chains and Cu-tetrazolate complex cation. The formation of oxide phase under hydrothermal conditions is discussed, giving importance of the role of geometry of the tetrazole ring.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Recommanded Product: 14389-12-9. 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. Compound: 5-(4-Pyridyl)-1H-tetrazole, is researched, Molecular C6H5N5, CAS is 14389-12-9, about pH-dependent synthesis of a cadmium coordination compound from a compound based on Hpytz ligand [Hpytz = 5-(4-pyridyl)tetrazole].

Reactions of CdSO4·6H2O and Hpytz [Hpytz = 5-(4-pyridyl)tetrazole] under high pH values produced a known compound, [Cd(pytz)2(H2O)4]·2H2O (1), which can be used to prepare [Cd(Hpytz)(SO4)(H2O)2] (2) by adjusting the pH to a lower level using H2SO4 under hydrothermal conditions. These compounds were characterized by elemental anal., IR spectroscopy, and single-crystal diffraction. X-ray anal. reveals that 1 features a mononuclear structure, while 2 affords a 1-dimensional polymeric chain structure. Compound 1 displays a 2-dimensional network, while 2 shows a 3-dimensional network by H bonding interactions. Also, the luminescent properties were studied at room temperature in the solid state.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Application In Synthesis of 5-(4-Pyridyl)-1H-tetrazole. 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: 5-(4-Pyridyl)-1H-tetrazole, is researched, Molecular C6H5N5, CAS is 14389-12-9, about Simple and efficient synthesis of 5-substituted 1-H-tetrazoles using metal-modified clay catalysts. Author is Chermahini, Alireza Najafi; Teimouri, Abbas; Moaddeli, Ali.

The synthesis of 5-substituted 1-H-tetrazoles based on reaction of a series of aromatic nitriles with sodium azide was investigated. The reaction was catalyzed by modified montmorillonite K-10 including Cu2+, Fe3+, Ni2+, and Zn2+ metal ions. The best results obtained by Mont-K10-Cu catalyst. The catalysts were reused several times without loss of their activity. The present procedure offers advantages such as a shorter reaction time, simple workup, recovery, and reusability of the catalyst.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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 Solid-State Coordination Chemistry of Copper(II) Tetrazolates: Anion Control of Frameworks Constructed from Trinuclear Copper(II) Building Blocks, published in 2009-06-01, which mentions a compound: 14389-12-9, Name is 5-(4-Pyridyl)-1H-tetrazole, Molecular C6H5N5, Electric Literature of C6H5N5.

The products of the reactions of Cu(II) starting materials with 4-pyridyltetrazole (4-Hpt) in DMF/MeOH solutions are determined by the anion identity and concentration In the absence of chloride, the 3-dimensional open-framework material [Cu3(OH)3(4-pt)3(DMF)4]·5DMF·3MeOH (1·5DMF·3MeOH) is isolated, while variations in the chloride concentration yield the 2-dimensional and 3-dimensional materials, [Cu3Cl4(4-pt)2(4Hpt)2]·4DMF·2MeOH (2) and [Cu3Cl2(4-pt)4]·4DMF·4MeOH (3), resp. All three structures exhibit trinuclear Cu(II) building blocks: the triangular {Cu3(μ3-OH)}5+ core in 1 and {Cu3Cl4(4-pt)4(4-Hpt)2}2- and {Cu3Cl2(4-pt)8}4- chains in 2 and 3, resp. All three materials display microporosity, which is highly dependent on the method of sample preparation

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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.Palazzi, Antonio; Stagni, Stefano; Selva, Simona; Monari, Magda researched the compound: 5-(4-Pyridyl)-1H-tetrazole( cas:14389-12-9 ).Synthetic Route of C6H5N5.They published the article 《Synthesis and reactivity of a new Fe(II) 5-(4-pyridyl)-tetrazolate complex and X-ray structure of its doubly protonated derivative. [Erratum to document cited in CA139:85466]》 about this compound( cas:14389-12-9 ) in Journal of Organometallic Chemistry. Keywords: erratum iron cyclopentadiene tetrazolylpyridine complex methylation protonation ring conjugation; crystal structure iron cyclopentadiene tetrazolylpyridine carbonyl complex erratum; mol structure iron cyclopentadiene tetrazolylpyridine carbonyl complex erratum. We’ll tell you more about this compound (cas:14389-12-9).

On page 135, right column, line 14 should read: “”… a significant interannular conjugation …””; lines 21-22 should read: “”… Noteworthy is the reversibility of …””. On page 137, left column, Section 2.3, the first sentence should read: “”As mentioned in the Introduction section, we recently …””.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Inorganic Chemistry Communications called A 2D metal-calixarene aggregate involving in situ generated 5-(4-pyridyl)tetrazolate ligand, Author is Hang, Xinxin; Du, Shangchao; Wang, Shentang; Liao, Wuping, which mentions a compound: 14389-12-9, SMILESS is C1(C2=NN=NN2)=CC=NC=C1, Molecular C6H5N5, Related Products of 14389-12-9.

A novel cobalt-thiacalix[4]arene compound, [Co4Cl2(TC4A)(ptz)2]•H2O (H4TC4A = p-tert-butylthiacalix[4]arene; ptz = 5-(4-pyridyl)tetrazolate) was obtained by solvothermal method, in which ptz was in situ-generated by click reaction of 4-cyanopyridine and sodium azide. This compound is featured with some wavelike layer motifs constructed by bridging the shuttlecock-like Co4-TC4A secondary building units (SBUs) with in situ-generated ptz ligands. Magnetic measurement reveals that the cobalt (II) centers exhibit antiferromagnetic interactions.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Chemistry of Heterocyclic Compounds (New York, NY, United States)(Translation of Khimiya Geterotsiklicheskikh Soedinenii) called Reaction of some heterocyclic formamidines with trimethylsilylethynyllithium, Author is Ajana, W.; Helliwell, M.; Collison, D.; Garner, C. D.; Joule, J. A., which mentions a compound: 20198-19-0, SMILESS is O=C1NC(N)=NC2=C1C=CC=C2, Molecular C8H7N3O, COA of Formula: C8H7N3O.

The reaction of a 2-[(dimethylamino)methyleneamino]pteridine, two 2-[(dimethylamino)methyleneamino]pyrimidines, and a 2-[(dimethylamino)methyleneamino]pyrido[2,3-d]pyrimidine with trimethylsilylethynylithium in the presence of benzyl chloroformate leads to the corresponding 2-[bis(trimethylsilylethynyl)methylamino]-substituted heterocycles. A series of such substrates was prepared and some of the factors which permit this transformation were delineated. For example, 2-[bis(trimethylsilylethynyl)methylamino]-5,6,7,8-tetrahydro-3-(2,2-dimethylpropanoyloxymethyl)quinazolin-4-one was produced, for which a crystal structure is presented.

There is still a lot of research devoted to this compound(SMILES：O=C1NC(N)=NC2=C1C=CC=C2)COA of Formula: C8H7N3O, and with the development of science, more effects of this compound(20198-19-0) can be discovered.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Gready, Jill E. published an article about the compound: 2-Aminoquinazolin-4(3H)-one( cas:20198-19-0,SMILESS:O=C1NC(N)=NC2=C1C=CC=C2 ).Recommanded Product: 20198-19-0. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:20198-19-0) through the article.

A purely structural definition of aromaticity based on the average ring bond length and π-bond order is proposed. The definition is illustrated for N-heterocycles by reference to theor. sto-3G and 3-21G geometries and charges for some pteridine derivatives The treatment focuses on the gross structural changes (i.e., ring size, overall degree of π-electron delocalization, and net ring charges), accompanying chem. changes, such as substitution, tautomerization, ring reduction, and deazination, as well as the structural interdependence of the two rings in a bicyclic ring system.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 14389-12-9, is researched, Molecular C6H5N5, about Solid state coordination chemistry of polyoxomolybdate clusters: Hydrothermal synthesis and structures of [{Cu3II(4-pt)2(4-Hpt)2(H2O)2}{Mo8O26}]·2H2O and [{Cu10I(4-pt)6(4-Hpt)2}{Mo8O26}]·2H2O (Hpt = 5(4′-pyridyl)tetrazole), the main research direction is copper pyridyltetrazole polyoxomolybdate preparation magnetic susceptibility thermolysis; crystal structure copper pyridyltetrazole polyoxomolybdate.Synthetic Route of C6H5N5.

The hydrothermal reactions of MoO3, Cu(CH3CO2)2·H2O and 5(4′-pyridyl)tetrazole (4-Hpt) yielded a low temperature Cu(II) phase [{Cu3(4-pt)2(4-Hpt)2(H2O)2}{Mo8O26}]·2H2O (1·2H2O) and a high temperature Cu(I) material [{Cu10(4-pt)6(4-Hpt)2}{Mo8O26}]·2H2O (2·2H2O). The two-dimensional structure of 1 is constructed from β-octamolybdate clusters embedded in a {Cu3(4-pt)2(4-Hpt)2(H2O)2}n4n+ network. The copper(II)-pyridyltetrazolate layer consists of trinuclear clusters of corner-sharing copper ‘4 + 2’ octahedra linked through the dipodal 4-pt ligands. In contrast, the three-dimensional structure of 2 contains the {β-Mo8O26}4- building block embedded in a three-dimensional {Cu10(4-pt)6(4-Hpt)2}n4n+ framework. The copper(I)-pyridyltetrazolate substructure consists of chains of Cu tetrahedra and trigonal planes bridged by tetrazolate groups and connected through exo-catenate {CuN2O} trigonal planar units bonding to the pyridyl nitrogens of the dipodal ligand.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5-(4-Pyridyl)-1H-tetrazole(SMILESS: C1(C2=NN=NN2)=CC=NC=C1,cas:14389-12-9) is researched.Formula: C9H6OS. The article 《Factors Affecting the Conformational Modulation of Flexible Ligands in the Self-Assembly Process of Coordination Polymers: Synthesis, Structural Characterization, Magnetic Properties, and Theoretical Studies of [Co(pda)(bix)]n, [Ni(pda)(bix)(H2O)]n, [Cu(pda)(bix)2(H2O)2]n·8nH2O, [Co2(μ-OH)(pda)(ptz)]n·nH2O, [Co(hfipbb)(bix)0.5]n, and [Co(2,6-pydc)(bix)1.5]n·4nH2O》 in relation to this compound, is published in Crystal Growth & Design. Let’s take a look at the latest research on this compound (cas:14389-12-9).

Six new metal complexes with the formulas [Co(pda)(bix)]n (1), [Ni(pda)(bix)(H2O)]n (2), [Cu(pda)(bix)2(H2O)2]n·8nH2O (3), [Co2(μ-OH)(pda)(ptz)]n·nH2O (4), [Co(hfipbb)(bix)0.5]n (5), and [Co(2,6-pydc)(bix)1.5]n·4nH2O (6) have been synthesized by the reactions of Co(II), Ni(II), and Cu(II) salts with two flexible ligands 1,4-phenylenediacetic acid (H2pda) and 1,4-bis(imidazol-1-ylmethyl)benzene (bix) in the presence of coligands 5-(4-pyridyl)tetrazole (4-ptz), 4,4′(hexafluoroisopropylidene)bis(benzoic acid) (H2hfipbb), and 2,6-pyridinedicarboxylic acid (2,6-H2pydc) and characterized by single crystal x-ray diffraction anal., IR spectroscopy, and thermogravimetric (TG) anal. Because of the coordination geometry around the metal ions and the diverse coordination modes of the flexible ligands in combination with the rigid and flexible coligands, the obtained complexes show diverse structures from a one-dimensional (1D) chain to three-dimensional (3D) coordination polymers. 1, 4, 5, And 6 are Co(II) complexes in which Co(II) ions show tetrahedral coordination in 1, trigonal bipyrimidal coordination in 4, and octahedral coordination in 5 and 6. Complexes 2 and 3 are resp. Ni(II) and Cu(II) complexes in which the metal ions are present in octahedral coordination geometries. Factors affecting the conformational change of the flexible ligands in the self-assembly process of coordination polymers, such as, coordination geometry around the metal ions and geometry of the coligands have been systematically studied. The rotation of the bonds C(sp3)-C(sp2) and C(sp3)-N(sp3) in H2pda and bix ligands causes different conformations (cis, trans, gauche); these conformations have been studied by measuring the torsion angle. A comparative study between the torsion angle of the particular conformation of the ligands and coordination geometry of metal ion/geometry of the coligand has been undertaken. All the possible cis, trans, and gauche conformations of the flexible ligands have been obtained/observed in the authors’ complexes. Theor. calculations were performed to determine the energies of the different conformations of the flexible ligands. The electronic properties of these complexes have also been studied in the solid state at room temperature Finally, the temperature-dependent magnetic studies for compounds 4 and 5 are described.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis