Category: 3229-00-3

Recommanded Product: 3229-00-3. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Pentaerythrityltetrabromide, is researched, Molecular C5H8Br4, CAS is 3229-00-3, about Tetrazoles: XLVII. A route to tetrazole-containing dendrimers. Author is Artamonova, T. V.; Zatsepina, M. V.; Koldobskii, G. I..

The reaction of 5-methylsulfonyl-1-phenyltetrazole with pentaerythritol in acetonitrile in the presence of sodium hydroxide gave tetrakis(1-phenyltetrazol-5-yloxymethyl)methane. A sulfur-containing analog of the latter was obtained by alkylation of 1-phenyl-4,5-dihydrotetrazole-5-thione with 1,3-dibromo-2,2-bis(bromomethyl)propane. Nitration of the resulting polytetrazoles afforded the tetrakis(p-nitrophenyl) derivatives which can be used in the synthesis of tetrazole-containing dendrimers according to the divergent scheme.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Ordering transitions in symmetrical molecules》. Authors are Westrum, Edgar F. Jr..The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).SDS of cas: 3229-00-3. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

The 298.15°K. values of the molal heat capacities and thermodynamic functions of C(CH2OH)4, C(CH2F)4, C(CH2Cl)4, C(CH2Br)4, and C(CH2I)4 were studied relative to the nature of the “”pseudo-rotational”” transitions occurring in the general compounds C(CH2X)4. Although little of unusual nature was manifest in the other 4 compounds, a sharp λ transition of considerable magnitude was found at 249.40°K. in C(CH2F)4, with a heat of transition of 3157.5 ± 2.3 cal./mole and a molal entropy of transition of 12.7 cal./degree mole. In “”pseudo-rotational”” transitions the entropy associated with the change occurring in the symmetry features of the structure, both mol. and crystallographic, should be in agreement with the entropy calculated statistically from the change in the number of symmetry features involved in the transition. The total entropy change for the transition in the fluoride may be considered as the sum of the following entropy terms: 3.56 e.u. for the orientational part of the entropy increment occurring in the transition in neopentane; Rln2 for the orientation of the -CC4 tetrahedron in the fluoride; 4Rln2 for the orientations of the -CH2F tetrahedra, and Rln2 for the introduction of the 4 F atoms into the mol. The total entropy was calculated from these terms to be 12.63 e.u., in excellent agreement with the measured value for the transition entropy of 12.66 e.u. occurring in the fluoride.

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Imidazole – Wikipedia,
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Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 3229-00-3, is researched, SMILESS is BrCC(CBr)(CBr)CBr, Molecular C5H8Br4Journal, Zeitschrift fuer Kristallographie – New Crystal Structures called Crystal structure of pentaerythrityl tetrakis(1-methyl-5-mercapto-1,2,3,4-tetrazole), C13H20N16S4, Author is Guo, Jiao; Liu, Ying-Ying, the main research direction is crystal structure pentaerythrityl methylmercaptotetrazole; mol structure pentaerythrityl methylmercaptotetrazole.Application of 3229-00-3.

Crystallog. data and at. coordinates are given. Because of the special arrangement of the four nitrogen atoms, this ligand offers intriguing characteristics: (i) the four nitrogen atoms can act as four potential coordination nodes; (ii) the four nitrogen atoms can twist around the quaternary carbon atom and four CH2 groups with different bond angles to meet the requirements of the metals for coordination. In addition, the bond distances and bond angles are all in normal range.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Pentaerythrityltetrabromide(SMILESS: BrCC(CBr)(CBr)CBr,cas:3229-00-3) is researched.Reference of 2,5-Diphenyloxazole. The article 《Synthesis of 2,2-bis(mercaptomethyl)-1,3-propanedithiol》 in relation to this compound, is published in Qingdao Keji Daxue Xuebao, Ziran Kexueban. Let’s take a look at the latest research on this compound (cas:3229-00-3).

2,2-Bis(mercaptomethyl)-1,3-propanedithiol was synthesized using pentaerythritol as raw materials. The synthetic route mainly comprised two steps. In the first step, the intermediate products pentaerythrityl bromide was synthesized from pentaerythritol, and through orthogonal experiment, the yield of pentaerythrityl bromide could reach 78%. In the second step, 2,2-bis(mercaptomethyl)-1,3-propanedithiol was synthesized through replacement and reduction reaction under acidic conditions with a yield of 78%.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Spiropentane》. Authors are Murray, M. J.; Stevenson, Eugene H..The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Recommanded Product: Pentaerythrityltetrabromide. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

A Raman spectroscopic study of the low-boiling products obtained in the debromination of pentaerythrityl bromide by Zn in aqueous MeOH indicated the presence of a 3rd component (I), which showed lines at 581 and 1033 cm.-1. Reduction in molten AcNH2 containing NaI and Na2CO3 increased the yield of I to 40%. Removal of olefins by AgNO3, AgClO4 and Br gives I, C5H8, b. 38.3-8.5°, n20D 1.4117. I is believed to be CH2.CH2.C.CH2.CH2.

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Imidazole – Wikipedia,
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HPLC of Formula: 3229-00-3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Pentaerythrityltetrabromide, is researched, Molecular C5H8Br4, CAS is 3229-00-3, about Synthesis of photoresponsive dendrimers with a pentaerythrityl tetraazobenzene core. Author is Szalai, Michael L.; McGrath, Dominic V..

Dendrimers are well-defined macromols. having an inherently globular shape. Precise placement of photochromic moieties within a dendrimer interior could lead to reversible, photoinduced property/behavior alteration. Interest lies in the effect of azobenzene photochem. E/Z isomerization on dendrimer properties. Incorporation of three azobenzene subunits at the core of a dendrimer has resulted in materials with both photomodulated size and polarity and dendrimers with four discrete states. The effect of increasing azobenzene content as well as altering the core geometry was explored. Incorporation of four azobenzene moieties at the dendrimer core will make possible the existence of five discrete mol. states depending on the E/Z configuration of the individual azobenzenes (EEEE, EEEZ, EEZZ, EZZZ, ZZZZ). The synthesis of tetraazobenzene-containing dendrimers having a tetrahedral pentaerythrityl-based core was presented.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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: 3229-00-3, is researched, Molecular C5H8Br4, about Comparison of the conformation of 3,3′(4H,4’H)-spirobi[2H-1,5-benzodioxepin] in the solid state and in solution, the main research direction is spirobibenzodioxepindicarboxylate configuration conformation; CD spirobibenzodioxepindicarboxylate.Synthetic Route of C5H8Br4.

The spiro-coplanar conformation of 6,6′-bis(methoxycarbonyl)-3,3′(4H,4’H)-spirobi[2H-1,5-benzodioxepin] (I, R = Me) and the 3P configuration of I [R = (1R,3R,4S)-menthyl] have been determined from chiroptical data by application of the exciton theory. The solid-state conformation of the central part of the menthol ester mol. is spiro-coplanar too, with nearly D2 symmetry. The menthol moieties have chair conformations, and the absolute configurations at their chiral centers have been assigned by using enantiomer-sensitive Bijvoet pairs; they agree with the known absolute configuration of menthol.

From this literature《Comparison of the conformation of 3,3′(4H,4’H)-spirobi[2H-1,5-benzodioxepin] in the solid state and in solution》,we know some information about this compound(3229-00-3)Synthetic Route of C5H8Br4, but this is not all information, there are many literatures related to this compound(3229-00-3).

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Imidazole – Wikipedia,
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Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 3229-00-3, is researched, SMILESS is BrCC(CBr)(CBr)CBr, Molecular C5H8Br4Journal, Zeitschrift fuer Naturforschung, Teil A: Astrophysik, Physik und Physikalische Chemie called Vibrational spectra of pentaerythritol derivatives. I. Vibrational spectra and normal coordinate treatment of tetrahalides of pentaerythritol, Author is Geiseler, Gerhard; Ratz, Lothar, the main research direction is PENTAERYTHRITYL HALIDE SPECTRA.Recommanded Product: Pentaerythrityltetrabromide.

The ir absorption spectra (4000-400 cm.-1) and the Raman spectra of the pentaerythrityl halides have been examined By comparison with the spectra of similar compounds and by a normal coordinate analysis with the aid of the Wilson GF-matrix method and on the basis of a modified valence force field, it was possible to assign a great deal of the normal vibration. The influence of the halogen atoms on the frequency of characteristic vibrations was discussed.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Heat capacities and thermodynamic properties of globular molecules. XIII. Transition and fusion of pentaerythrityl chloride and bromide, transition of pentaerythrityl iodide》. Authors are Clever, H. Lawrence; Wong, Wen-Kuei; Westrum, Edgar F. Jr..The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Reference of Pentaerythrityltetrabromide. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

cf. CA 61, 6467h. The heat capacities of crystalline pentaerythrityl iodide and of crystalline and liquid pentaerythrityl chloride and bromide above 290°K. were determined by adiabatic calorimetry. The high entropies of fusion, 14.45 and 15.42 cal./mole degree found for pentaerythrityl chloride and bromide, resp., indicate that these halides have no plastic crystal phase at atm. pressure. At temperatures corresponding to the same fraction of their resp. m.ps. all 3 compounds show broad λ-anomalies in their heat capacity curves. These involve excess entropies of <1 cal./mole degree. From this literature《Heat capacities and thermodynamic properties of globular molecules. XIII. Transition and fusion of pentaerythrityl chloride and bromide, transition of pentaerythrityl iodide》,we know some information about this compound(3229-00-3)Reference of Pentaerythrityltetrabromide, but this is not all information, there are many literatures related to this compound(3229-00-3).

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Imidazole – Wikipedia,
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HPLC of Formula: 3229-00-3. 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: Pentaerythrityltetrabromide, is researched, Molecular C5H8Br4, CAS is 3229-00-3, about Tetrakis(pyrazol-1-ylmethyl)methane and its hypodentate binuclear complex with silver(I) nitrate. Author is McMorran, David A.; Pfadenhauer, Stephan; Steel, Peter J..

The preparation and x-ray crystal structure of tetrakis(pyrazol-1-ylmethyl)methane (HL) are described. This new ligand reacts with Ag(I) nitrate to give Ag2L2(NO3)2, in which the ligand bridges two trigonal Ag atoms with bidentate and monodentate coordination domains. As such the ligand is hypodentate with one noncoordinated pyrazole group.

There is still a lot of research devoted to this compound(SMILES：BrCC(CBr)(CBr)CBr)HPLC of Formula: 3229-00-3, and with the development of science, more effects of this compound(3229-00-3) can be discovered.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem