Tag: M.W=400-500

Safety of Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II). 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: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Abrupt Switching of Crystal Fields during Formation of Molecular Contacts. Author is Chen, Jinjie; Isshiki, Hironari; Baretzky, Clemens; Balashov, Timofey; Wulfhekel, Wulf.

Magnetic mols. have the potential to be used as building blocks for bits in quantum computers. The spin states of the magnetic ion in the mol. can be represented by the effective spin Hamiltonian describing the zero field splitting (ZFS) of the magnetic states. We determined the ZFS of mech. flexible metal-chelate mols. (Co, Ni, and Cu as metal ions) adsorbed on Cu2N/Cu(100) by inelastic tunneling spectroscopy at temperatures down to 30 mK. When moving the tip toward the mol., the tunneling current abruptly jumps to higher values, indicating the sudden deformation of the mol. bridging the tunneling junction. Hand in hand with the formation of the contact, an abrupt change of the ZFS occurs. This work also implies that ZFS expected in mech. break junctions can drastically deviate from that of adsorbed mols. probed by other techniques.

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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, Article, Angewandte Chemie, International Edition called Asymmetric Synthesis and Application of Chiral Spirosilabiindanes, Author is Chang, Xin; Ma, Pei-Long; Chen, Hong-Chao; Li, Chuan-Ying; Wang, Peng, which mentions a compound: 32305-98-9, SMILESS is CC1(C)O[C@@H](CP(C2=CC=CC=C2)C3=CC=CC=C3)[C@H](CP(C4=CC=CC=C4)C5=CC=CC=C5)O1, Molecular C31H32O2P2, Category: esters-buliding-blocks.

Reported here is the development of a class of chiral spirosilabiindane scaffolds by Rh-catalyzed asym. double hydrosilation, for the 1st time. Enantiopure SPSiOL (spirosilabiindane diol), a new type of chiral building block for the preparation of various chiral ligands and catalysts, was readily prepared on >10 g scale using this protocol. The potential of this new spirosilabiindane scaffold in asym. catalysis was preliminarily demonstrated by development of the corresponding monodentate phosphoramidite ligands (SPSiPhos), which were used in both a Rh-catalyzed hydrogenation and a Pd-catalyzed intramol. carboamination.

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Electric Literature of C22H38NiO4. 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: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Studies in negative ion mass spectrometry. IX. Electron capture by a series of tris- and bis-(dipivaloylmethanato) metal chelates.

Electron capture data and neg. ion mass spectra are reported for ML2 and ML3 where L = dipivaloylmethane and M = Sc(III), Cr(III), Mn(III), Fe(III), Co(III), Al(III), Ga(III), In(III), Co(II), Ni(II), Cu(II), Zn(II). The principal ions observed were mol. ions and ligand ions. Reaction schemes are proposed for the formation of ligand ions and for fragment ions, which account for <0.1% of total ion currents. Variations in neg. ion mass spectra are attributed to the influence of the metal atom and its 3d electron configuration on the electron capture process. The use of neg. ion mass spectrometry in the area of ultratrace metal anal. is discussed and estimates of detection limits reported. This literature about this compound(14481-08-4)Electric Literature of C22H38NiO4has given us a lot of inspiration, and I hope that the research on this compound(Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II)) can be further advanced. Maybe we can get more compounds in a similar way.

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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 called The crystal and molecular structure of bis(2,2,6,6-tetramethylheptane-3,5-dionato)nickel(II), Author is Cotton, F. A.; Wise, J. J., which mentions a compound: 14481-08-4, SMILESS is CC(C)(C1=O[Ni+2]2(O=C(C(C)(C)C)[CH-]1)O=C([CH-]C(C(C)(C)C)=O2)C(C)(C)C)C, Molecular C22H38NiO4, Product Details of 14481-08-4.

The crystal and mol. structures of the title compound, also called bis(dipivaloylmethanido)nickel(II), Ni(DPM)2, have been determined in a single crystal x-ray diffraction study. The unit cell is monoclinic (space group P21/a) with a 10.70 ± 0.01, b 10.98 ± 0.02, c 10.39 ± 0.02 A., β 113° 16′ ± 15′, and Z = 2. As expected from earlier studies by C. and Fackler (CA 56, 4352h), the mols. are mononuclear, essentially planar, and centrosym. The Ni-O distances, 1.836 ± 0.005 A., are much shorter than those in a number of complexes in which Ni(II) is octahedrally coordinated by O atoms. This can be explained by the absence of electrons in the antibonding σ-M.O. with dxy symmetry. The orientation of the mols. in the unit cell is fully described for future reference in the reporting of polarized optical absorption studies of this substance and its isomorphous Cu(II) analog.

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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.Bakovets, V. V. researched the compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II)( cas:14481-08-4 ).SDS of cas: 14481-08-4.They published the article 《Adsorption of the nickel β-diketonates NKI, NKTE, NDPM, and their ligands on the surfaces of nickel and silicon》 about this compound( cas:14481-08-4 ) in Kolloidnyi Zhurnal. Keywords: adsorption nickel diketonate silicon surface; orientation effect diketonate adsorption interaction. We’ll tell you more about this compound (cas:14481-08-4).

The orientation effects during adsorption interaction of some Ni β-diketonates and the ligands with Ni or Si surfaces in Et2O solutions were assessed. On Ni the ketoiminate (NKI), trifluoroketoiminate (NKTF), these ligands, and also dipivaloylmethane (NDPM) are adsorbed plane-parallel to the surface, so that their radicals (CH3, CF3) are directed away from the surface. It is characteristic for the adsorption of Ni dipivaloylmethanate on Ni and Si that, of all the adsorbates considered on Si the CH3 and CF3 groups are directed towards the adsorbent surface.

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Ester – Wikipedia,
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Reference of Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II). 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: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Thermochemical properties of the chelate complexes of some 3d-electron elements with 2,2,6,6-tetramethylheptane-3,5-dione. Part II. Complexes of nickel(II), copper(II) and zinc(II). Author is Giera, Edward; Kakolowicz, Wladyslaw.

The standard molar enthalpies of formation of Ni(II), Cu(II) and Zn(II) complexes with 2,2,6,6-tetramethylheptane-3,5-dione (dipivaloylmethane, HDPM) were determined by solution calorimetry. The enthalpies of hypothetical dissociation processes of complexes in the gaseous phase were calculated to determine the mean bond dissociation energies 〈D〉(M-O) and the mean coordinate bond dissociation energies 〈DCB〉(M-O): M(DPM)2(g) = M(g) + 2DPM.(g) and M(DPM)2(g) = M2+(g) + 2DPM-(g), resp. The thermochem. crystal-field stabilization energies were determined for Fe(II), Co(II), Ni(II) and Cu(II) complexes.

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Harding, Phimphaka; Harding, David J.; Phonsri, Wasinee; Saithong, Saowanit; Phetmung, Hirihattaya published the article 《Synthesis and electrochemical studies of octahedral nickel β-diketonate complexes》. Keywords: nickel diketonate diimine ethylenediamine complex preparation; electrochem oxidation nickel diketonate diimine ethylenediamine complex; crystal structure nickel diketonate diimine ethylenediamine complex.They researched the compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II)( cas:14481-08-4 ).Category: esters-buliding-blocks. 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:14481-08-4) here.

The reaction of [Ni(tmhd)2] and [Ni(dbm)2] (Htmhd = 2,2,6,6-tetramethylheptane-3,5-dione; Hdbm = dibenzoylmethane) with N-donor chelating ligands in CH2Cl2 and acetone, resp., yields [Ni(tmhd)2(L-L)] (L-L = 2,2′-bpy 1, phen 2 and dmae (2-dimethylaminoethyl)amine 3) and [Ni(dbm)2(L-L)] (L-L = 2,2′-bpy 4, phen 5, dmae 6). UV-visible spectroscopy shows very strong bands in the UV region consistent with ligand centered π → π* transitions. The electrochem. studies of 1-6 reveal oxidation to Ni(III). The [Ni(tmhd)2(L-L)] 1-3 are more easily oxidized by ∼300 mV and are quasi-reversible whereas for the [Ni(dbm)2(L-L)] series only complex 6 shows significant reversibility. X-ray crystallog. studies were conducted in the case of [Ni(dbm)2(phen)] 5 and [Ni(dbm)2(dmae)] 6. The structures both show that the Ni metal center is octahedral with an O4N2 coordination environment. In the structures the β-diketonate ligands exhibit a cis-arrangement, with the metal displaced out of the planar chelate ring.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II), is researched, Molecular C22H38NiO4, CAS is 14481-08-4, about Interactions of some nitrogen, oxygen, and sulfur heterocycles with gadolinium and nickel chelates. A carbon-13 nuclear magnetic resonance spin-lattice relaxation study, the main research direction is gadolinium coordination heterocycle NMR; nickel coordination heterocycle NMR; heterocycle complex magnetic relaxation; pyrrolidine complex magnetic relaxation; THF complex magnetic relaxation; tetrahydrothiophene complex magnetic relaxation; pyrrole magnetic relaxation; furan magnetic relaxation; thiophene magnetic relaxation.Related Products of 14481-08-4.

The interaction of pyrrole, pyrrolidine, furan, THF, thiophene, and tetrahydrothiophene with GdL3 and NiL2 (L = 2,2,6,6-tetramethylheptane-3,5-dionate) was studied by determination of electron-nuclear spin-lattice relaxation times for 13C in natural abundance. The results indicate complex formation between GdL3 and pyrrolidine and THF, and between NiL2 and pyrrolidine, THF, and tetrahydrothiophene. Competition experiments gave the relative affinities of the metal chelates for different ligand donor atoms: N > O > S for GdL3, and N > O ≈ S for NiL2. In the case of NiL2, the relaxation rates deviate largely from the predictions of the Solomon-Bloembergen equation; this was discussed in relation to contact shift measurements.

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Dent, Andrew; Evans, John; Newton, Mark; Corker, Judith; Russell, Andrea; Abdul Rahman, M. B.; Fiddy, Steven; Mathew, Rebecca; Farrow, Richard; Salvini, Giuseppe; Atkinson, Phillip published an article about the compound: Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)nickel(II)( cas:14481-08-4,SMILESS:CC(C)(C1=O[Ni+2]2(O=C(C(C)(C)C)[CH-]1)O=C([CH-]C(C(C)(C)C)=O2)C(C)(C)C)C ).Related Products of 14481-08-4. 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:14481-08-4) through the article.

A long program involving the development of a fast linear and stable detector, and the recent upgrade of the bent monochromator to a 4-point one at station 9.3 Daresbury Laboratory is showing results such that it has now become possible to obtain analyzable XAFS data on 50mM solutions in time scales of a second or less. Three examples of such data are shown: a homogeneous Ni catalyst reaction using a stopped flow system, a heterogeneous catalyst reduction showing time dependent data collected in a microreactor, and an electrochem. system showing the oxidation of small Pt particles as the potential is changed. The improvements have come from two major developments – the monochromator and the detector.

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Yu, Si-min; Snavely, William K.; Chaudhari, Raghunath V.; Subramaniam, Bala published an article about the compound: (((4R,5R)-2,2-Dimethyl-1,3-dioxolane-4,5-diyl)bis(methylene))bis(diphenylphosphine)( cas:32305-98-9,SMILESS:CC1(C)O[C@@H](CP(C2=CC=CC=C2)C3=CC=CC=C3)[C@H](CP(C4=CC=CC=C4)C5=CC=CC=C5)O1 ).Quality Control of (((4R,5R)-2,2-Dimethyl-1,3-dioxolane-4,5-diyl)bis(methylene))bis(diphenylphosphine). 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:32305-98-9) through the article.

Rh-catalyzed hydroformylation of butadiene to adipaldehyde is a promising alternative route for producing valuable C6 compounds such as adipic acid and hexamethylenediamine. Fundamental insights into reaction pathways, aimed at enhancing adipaldehyde yield, were obtained from temporal concentration profiles and in situ ReactIR studies of butadiene hydroformylation on Rh complexes at 80°C and 14 bar syngas (molar CO/H2 = 1) pressure in a batch reactor. Specifically, the effects of operating conditions and eight com. available ligands on activity and selectivity were systematically investigated. It was found that the adipaldehyde selectivity is independent of the ligand/Rh ratio, rhodium concentration, butadiene concentration and syngas pressure, but significantly dependent on the type of ligand used. For example, while the DIOP ligand provided an adipaldehyde yield of ∼40% with butadiene as a substrate, the 6-DPPon ligand gave a maximum adipaldehyde yield of ∼93% with 4-pentenal as substrate. Furthermore, the adipaldehyde selectivity correlates well with the natural bite angle of the various ligands. ReactIR studies suggest that the preferential formation of the stable rhodium η3-crotyl complex with the various Rh complexes may be the main reason for the low adipaldehyde selectivity.

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