4045-44-7Relevant articles and documents
Synthesis and characterization of cyclopentadienylgallium amide compounds as potential single source precursors to GaN
Perrotin,Kennon, Bretni S.,Twamley, Brendan,Miller, Joel S.,Shapiro, Pamela J.
, p. 216 - 222 (2014)
The synthesis, spectroscopic characterization, and single crystal X-ray structures of [(η5-C5Me4H)2Ga(μ2-NH2)] (1), [(η5-C5Me5)2Ga(μ2-
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deVries,L.
, p. 1838 (1960)
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Reactivity of Cp*Al towards Silanols: Formation and Hydrolysis of Alumosiloxanes
Wittwer, Philipp,Stelzer, Adrian,Braun, Thomas
, p. 3187 - 3194 (2018)
Treatment of [Cp*Al]4 (1) (Cp* = pentamethylcyclopentadienyl) with various silanols gave access to the compounds [Al{OSi(OtBu)3}3(DMAP)] (3) (DMAP = 4-dimethylaminopyridine), [HNEt3][Al(OSiPh3)4
Enzymelike catalysis of the nazarov cyclization by supramolecular encapsulation
Hastings, Courtney J.,Pluth, Michael D.,Bergman, Robert G.,Raymond, Kenneth N.
, p. 6938 - 6940 (2010)
The water-soluble, self-assembled, tetrahedral assembly K 12Ga4L6 (L = 1,5-biscatecholamidenaphthalene) catalyzes the Nazarov cyclization of 1,3-pentadienols with extremely high levels of efficiency. The catalyzed reaction proceeds over a million times faster than the background reaction, an increase comparable to those observed in some enzymatic systems. This catalysis operates under aqueous conditions at mild temperatures and pH, and the reaction is halted by the addition of an appropriate inhibitor. This unprecedented rate enhancement is attributed to both the stabilization of protonated reaction intermediates and the effect of constrictive binding on the bound guest.
Childs,Zeya
, p. 3425,3426 (1975)
Pentamethyl cyclopentadiene preparation method
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Paragraph 0013-0015, (2019/08/07)
The invention relates to a pentamethyl cyclopentadiene preparation method which is characterized in that a Grignard reagent is prepared from chloromethane and magnesium in ether solvents under low-temperature conditions, temperature is reduced, tetramethyl cyclopentanone is dropwise added, temperature reaction is performed, and hydrochloric acid is added after reaction to perform dehydration alkene forming reaction. Post-treatment and rectification under vacuum are performed to obtain qualified products. The preparation method has the advantages that raw materials are inexpensive and easy to obtain, yield is high, production cost can be controlled, process steps are short, conditions are mild, and the preparation method is safe, reliable and suitable for industrial production.
Reactivity Study of Pyridyl-Substituted 1-Metalla-2,5-diaza-cyclopenta-2,4-dienes of Group 4 Metallocenes
Becker, Lisanne,Rei?, Fabian,Altenburger, Kai,Spannenberg, Anke,Arndt, Perdita,Jiao, Haijun,Rosenthal, Uwe
, p. 10826 - 10838 (2016/07/27)
In this work the reactivity of 1-metalla-2,5-diaza-cyclopenta-2,4-dienes of group 4 metallocenes, especially of the pyridyl-substituted examples, towards small molecules is investigated. The addition of H2, CO2, Ph?C≡N, 2-py?C≡N, 1,3-dicyanobenzene or 2,6-dicyanopyridine results in exchange reactions, which are accompanied by the elimination of a nitrile. For CO2, a coordination to the five-membered cycle occurs in case of Cp*2Zr(N=C(2-py)?C(2-py)=N). A 1,4-diaza-buta-1,3-diene complex is formed by H-transfer in the conversion of the analogous titanocene compound with CH3?C≡N, PhCH2?C≡N or acetone. For CH3?C≡N a coupling product of three acetonitrile molecules is established additionally. In order to split off the metallocene from the coupled nitriles, we examined reactions with HCl, PhPCl2, PhPSCl2and SOCl2. In the last case, the respective thiadiazole oxides and the metallocene dichlorides were obtained. A subsequent reaction produced thiadiazoles.
