Category: 141556-42-5

Recommanded Product: 141556-42-5. 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: 1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene, is researched, Molecular C21H24N2, CAS is 141556-42-5, about Synthesis of ultra-high-molecular-weight ethylene-propylene copolymer via quasi-living copolymerization with N-heterocyclic carbene ligated vanadium complexes.

The quasi-living copolymerization of ethylene with propylene was achieved by using N-heterocyclic carbene (NHC) ligated vanadium complex (V3, VOCl3[1,3-(2,6-iPr2C6H3)2(NCH:)2C:]) due to the stabilization of active center by the introduction of bulky and electron rich NHC ligand with bulky iso-Pr substituents at the ortho positions of the Ph rings. The weight-average mol. weight (Mw) of the resulting copolymer increases linearly with its weight in 20 min. The ultra-high-mol.-weight (UHMW) ethylene-propylene copolymer (Mw = 1612 kg mol-1) can be synthesized with V3/Et3Al2Cl3 catalytic system. The novel complex V4′ (VCl3[1,3-(2,4,6-Me3C6H2)2(NCH:)2C:]·2THF) was constructed by the introduction of two coordinated THF mols. and decrease in steric hindrance at the ortho positions of Ph rings. The UHMW ethylene-propylene copolymer (Mw = 1167 kg mol-1) can also be synthesized by using V4’/Et3Al2Cl3 catalytic system. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018.

If you want to learn more about this compound(1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene)Recommanded Product: 141556-42-5, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(141556-42-5).

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

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: 141556-42-5, is researched, SMILESS is CC1=CC(C)=CC(C)=C1[N+]2=[C-]N(C3=C(C)C=C(C)C=C3C)C=C2, Molecular C21H24N2Journal, Mendeleev Communications called Rare example of structurally characterized mononuclear N-heterocyclic carbene containing zinc carboxylate, Author is Yambulatov, Dmitriy S.; Petrov, Pavel A.; Nelyubina, Yulia V.; Starikova, Alyona A.; Pavlov, Alexander A.; Aleshin, Dmitry Yu.; Nikolaevskii, Stanislav A.; Kiskin, Mikhail A.; Sokolov, Maxim N.; Eremenko, Igor L., the main research direction is crystal structure mol optimized heterocyclic carbene zinc carboxylate preparation.Name: 1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene.

An adduct of ZnII pivalate with N-heterocyclic carbene 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene has been prepared and characterized by X-ray diffraction anal., NMR spectroscopy and DFT calculations The compound preserves mononuclear structure in solution and does not switch the coordination mode from normal to abnormal.

Here is a brief introduction to this compound(141556-42-5)Name: 1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene, if you want to know about other compounds related to this compound(141556-42-5), you can read my other articles.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene( cas:141556-42-5 ) is researched.Related Products of 141556-42-5.Miloserdov, Fedor M.; Pecharman, Anne-Frederique; Sotorrios, Lia; Rajabi, Nasir A.; Lowe, John P.; Macgregor, Stuart A.; Mahon, Mary F.; Whittlesey, Michael K. published the article 《Bonding and Reactivity of a Pair of Neutral and Cationic Heterobimetallic RuZn2 Complexes》 about this compound( cas:141556-42-5 ) in Inorganic Chemistry. Keywords: thermal decomposition stability reactivity ruthenium zinc heterobimetallic complex preparation; crystal structure mol electronic optimized ruthenium zinc heterobimetallic complex; bonding reactivity neutral cationic heterobimetallic ruthenium dizinc complex preparation. Let’s learn more about this compound (cas:141556-42-5).

A combined exptl. and computational study of the structure and reactivity of two [RuZn2Me2] complexes, neutral [Ru(PPh3)(Ph2PC6H4)2(ZnMe)2] (2) and cationic [Ru(PPh3)2(Ph2PC6H4)(ZnMe)2][BArF4] ([BArF4] = [B{3,5-(CF3)2C6H3}4]) (3), is presented. Structural and computational analyses indicate these complexes are best formulated as containing discrete ZnMe ligands in which direct Ru-Zn bonding is complemented by weaker Zn···Zn interactions. The latter are stronger in 2, and both complexes exhibit an addnl. Zn···Caryl interaction with a cyclometalated phosphine ligand, this being stronger in 3. Both 2 and 3 show diverse reactivity under thermolysis and with Lewis bases (PnBu3, PCy3, and IMes). With 3, all three Lewis bases result in the loss of [ZnMe]+. In contrast, 2 undergoes PPh3 substitution with PnBu3, but with IMes, loss of ZnMe2 occurs to form [Ru(PPh3)(C6H4PPh2)(C6H4PPhC6H4Zn(IMes))H] (7). The reaction of 3 with H2 affords the cationic trihydride complex [Ru(PPh3)2(ZnMe)2(H)3][BArF4] (12). Computational analyses indicate that both 12 and 7 feature bridging hydrides that are biased toward Ru over Zn.

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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

Shen, Wangqiang; Yang, Le; Wu, Yongbo; Bao, Lipiao; Li, Ying; Jin, Peng; Fang, Hongyun; Xie, Yunpeng; Lu, Xing published the article 《Reactions between N-Heterocyclic Carbene and Lutetium-Metallofullerenes: High Regioselectivity Directed by Electronic Effect in Addition to Steric Hindrance》. Keywords: azaheterocyclic carbene lutetium metallofullerene regioselective reaction.They researched the compound: 1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene( cas:141556-42-5 ).Product Details of 141556-42-5. 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:141556-42-5) here.

The Lewis acid-base pairing reaction between strained N-heterocyclic carbene (NHC) and endohedral metallofullerenes (EMFs) is an efficient strategy to obtain stable derivatives in a highly regioselective manner. Herein, we report an in-depth study on the reactions between 3-dimesityl-1H-imidazol-3-ium-2-ide (1) and three different EMFs, namely, Lu3N@Ih(7)-C80, Lu2@C3v(8)-C82, and Lu2@C2v(9)-C82, resp. Only one monoadduct is obtained for each EMF under certain conditions, demonstrating surprisingly high regioselectivity and exclusive formation of monoadducts. X-ray results of the derivatives of Lu3N@C80 reveal that an epoxide adduct (2a) with a specific [6,6,6]-carbon atom of the C80 cage singly bonded to the normal carbene center (C2) of the NHC is obtained under ambient condition, whereas a pure argon atm. gives 2b with an abnormal C5-bonding structure. In contrast, the derivatives of Lu2@C82 (3 and 4) are both normal C2-bonding [5,6,6]-adducts without oxygen addition, even though air is involved in the reaction. Our theor. results confirm that the remarkably high regioselectivity and the quant. formation of monoadducts are direct result from the distributions of MO and electrostatic potential on the cage surfaces in addition to the previously assumed steric hindrance between the fullerene cage and the NHC moiety.

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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles

COA of Formula: C21H24N2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene, is researched, Molecular C21H24N2, CAS is 141556-42-5, about NHC-Stabilized 1,2-Dihalodiborenes: Synthesis, Characterization, and Reactivity Toward Elemental Chalcogens. Author is Stoy, Andreas; Arrowsmith, Merle; Eysselein, Maximilian; Dellermann, Theresa; Mies, Jan; Radacki, Krzysztof; Kupfer, Thomas; Braunschweig, Holger.

The 2-fold reduction of B2X4(NHC)2 (X = Cl, Br, I; NHC = (un)saturated N-heterocyclic carbene) yields the corresponding green-colored 1,2-dihalodiborenes B2X2(NHC)2, the 11B NMR resonances of which are strongly upfield-shifted upon descending the halide group. The diborenes crystallize as the trans isomers, with relatively short B=B double bonds (1.513(9) to 1.568(4) Å). Cyclic voltammetric experiments with these diborenes reveal reversible one-electron oxidation processes to the corresponding diboron radical cation (E1/2 = -1.16 to -1.50 V); the reducing power of B2X2(NHC)2 increasing with the electronegativity of the halide and for the less π-accepting unsaturated NHCs. The main UV-vis absorption (393-463 nm), which corresponds mainly to a HOMO → LUMO transition, undergoes a blue shift upon descending the halide group and shows some dependence on the stereoelectronics of the NHC ligands. Computational analyses show that the HOMO of B2X2(NHC)2 is mostly localized on the B=B π bond, with the contribution from halide p orbitals decreasing down the group, and the saturated NHCs affording some π-bonding delocalization over the B-CNHC bonds. The calculated HOMO and LUMO energies decrease upon descending the halide group, while the HOMO-LUMO gap also decreases, correlating well with the cyclovoltammetry and UV-vis data. The reactions of B2Br2(NHC)2 with elemental sulfur and red selenium lead to the formation of the corresponding diborathiiranes and seleniranes, resp., which were characterized by NMR and UV-vis spectroscopy, cyclic voltammetry, and X-ray diffraction analyses. In one case, an addnl. one-electron oxidation yields a unique cyclic B2Se radical cation. Computational analyses show that the localization of the HOMO and HOMO – 1 of the diboraseleniranes is inverted compared to the diborathiiranes.

Here is a brief introduction to this compound(141556-42-5)COA of Formula: C21H24N2, if you want to know about other compounds related to this compound(141556-42-5), you can read my other articles.

Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles