CAS: 13499-05-3; Hafnium(Iv) Chloride

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CAS号31406-67-4 四苄基铪 | CAS号19962-11-9 四(二乙氨基)铪 | CAS号97-88-1 甲基丙烯酸丁酯 | CAS号85959-83-7 二氯化双(五甲基环戊二烯基)铪 | CAS号75181-08-7 五甲基环戊二烯基三氯化铪(IV) | CAS号75-77-4 三甲基氯硅烷 | CAS号12116-66-4 二氯二茂铪 | CAS号13777-23-6 碘化铪 | CAS号13777-22-5 溴化铪 | CAS号13709-52-9 四氟化铪

以 Neat (No Solvent) 用作溶剂,化学反应生成氯化铪
参考文献:稀有气体基质中某些四氯化物的振动光谱,特别是参考thcl 4和uci 4的分子形状
标题:稀有气体基质中某些四氯化物的振动光谱,特别是参考thcl 4和uci 4的分子形状
摘要:报告了在惰性气体基质中分离的锡,铅,Ha,Th和铀四氯化物的红外光谱.对于锡,铅和ha化合物所获得的结果遵循四面体分子的预期同位素模式,只是观测到全35 Cl同位素异构体在高频方面还具有其他弱点.相反,对于四氯化th,观测到的光谱不是t D分子的特征,而是可以适合于具有c 2 V对称性的物质.四氯化铀获得了相似的结果(尽管不够详细).
Doi:10.1039/dt9840000819

专利信息

专利号:US-6479685-B2
优先权日:1998-01-09
标题 :Metallocene catalysts for synthesis of high-melting polyolefin copolymer elastomers
发明人：WAYMOUTH ROBERT M; KRAVCHENKO RAISA L; MACIEJEWSKI PETOFF JENNIFER; HUNG JOYCE
权利人:TRUSTEES OF THE LELAND STANDAR
摘要:Metallocene catalysts having plural coordination geometries for synthesis of high melting polyolefin copolymers suitable as thermoplastic elastomers. The inventive catalysts comprise unbridged, substituted or unsubstituted cyclopentadienyl metallocene catalysts that are capable of inter-converting between states with different polymerization or copolymerization characteristics, which interconversion is controlled by selecting the substituents of the cyclopentadienyl ligands so that the rate of interconversion of the two states is within several orders of magnitude of the rate of formation of a single polymer chain. Where r i >r f the polymer can be characterized as multiblock; where r i
专利号:US-11655264-B2
优先权日:2015-11-25
标题:Metallocene compounds, and preparation and use thereof for synthesis of poly-alpha-olefins as lubricating base oil
发明人：WEI DONGCHU; LI BING
权利人:APALENE TECH CO LTD JIAXING
摘要:The present invention relates to a metallocene compound, and preparation and use thereof, and the compound can be used as a catalyst for synthesis of poly-α-olefin as lubricating base oil. The metallocene compound includes a substituted aryl group, a bridged atom, an optionally unsubstituted, 3-mono-substituted or 3,6-disubstituted 5H-indeno [1,2-b] pyridyl group or optionally unsubstituted, 3-mono-substituted or 3,6-disubstituted 5H-indeno [1,2-b] thiopyranyl group, and a metal coordination group. As a catalyst, the metallocene compound is shown to be structurally stable and high in catalytic efficiency, and the preparation of the catalyst is relatively easy in operation, high in yield, low in cost, low in pollution and easy to scale up for industrial production.

专利号:US-2007074541-A1
优先权日:2003-10-10
标 题:Synthesis of germanium sulphide and related compounds
发明人：BADDING JOHN V; HEWAK DANIEL W; HUANG CHUNG-CHE
权利人:UNIV SOUTHAMPTON
摘要:The invention relates to synthesis of germanium sulphide glasses and optical devices formed therefrom. In a chemical vapour deposition process, germanium tetrachloride is reacted with hydrogen sulphide at temperatures in the range 450-700° C. to form germanium sulphide. Lower temperatures within this range of 450-550° C. directly produce a glass, whereas higher temperatures within the range of 600-700° C. produce a crystalline powder which can then be reduced to a glass by subsequent melting and annealing. The reaction is preferably carried out at atmospheric pressure or slightly higher. Thin films and bulk glasses suitable for optical waveguides can be formed directly in one processing step as can powders and microspheres. The materials synthesised are of a high purity with low oxide impurities and only trace levels of transition metal ions.

专利号:US-2025162968-A1
优先权日:2022-02-02
标 题 :Method for Producing Ionizable Lipids or Intermediates for the Synthesis of Such Lipids
发明人：ATMURI N D PRASAD; ARNOLD DEAGLAN; SAADATI FARIBA; KUREK DANIEL; KULKARNI JAYESH; WITZIGMANN DOMINIK; CIUFOLINI MARCO A
权利人:NANOVATION THERAPEUTICS INC
摘要:The present disclosure provides a method for producing one or more intermediates for the synthesis of one or more ionizable lipids, the method comprising: (i) producing a beta-ketoacid by reacting a cyclic ester, a terminal hydroxyester or a derivative thereof, a dicarboxylic acid half ester, or an acid chloride derivative of the dicarboxylic acid half ester, in a condensation reaction, thereby producing the beta-ketoacid or a beta-ketoester that is hydrolyzed to produce the beta-ketoacid; and (ii) decarboxylating the beta-ketoacid, thereby producing the one or more intermediates, wherein the one or more intermediates have a structure that may be defined by Formula A. Further provided is a method for producing ionizable lipid from the intermediate comprising adding an ionizable head group moiety to (a) a ketone group of one or more intermediates having the structure that may be defined by Formula A; or (b) a corresponding alcohol of the intermediate.

专利号:US-6899858-B2
优先权日:2003-01-23
标题:Method of synthesis of hafnium nitrate for HfO2 thin film deposition via ALCVD process
发明人：ZHUANG WEI-WEI; EVANS DAVID R; HSU SHENG TENG
权利人:SHARP LAB OF AMERICA INC
摘要:A method of preparing a hafnium nitrate thin film includes placing phosphorus pentoxide in a first vessel; connecting the first vessel to a second vessel containing hafnium tetrachloride; cooling the second vessel with liquid nitrogen; dropping fuming nitric acid into the first vessel producing N 2 O 5 gas; allowing the N 2 O 5 gas to enter the second vessel; heating the first vessel until the reaction is substantially complete; disconnecting the two vessels; removing the second vessel from the liquid nitrogen bath; heating the second vessel; refluxing the contents of the second vessel; drying the compound in the second vessel by dynamic pumping; purifying the compound in the second vessel by sublimation to form Hf(NO 3 ) 4 , and heating the Hf(NO 3 ) 4 to produce HfO 2 for use in an ALCVD process.

专利号:US-7081543-B2
优先权日:2000-02-08
标 题:Bridged biscyclopentadienyl ligands and method of preparation
发明人：RIX FRANCIS C; BURKHARDT TERRY J; LI ROBERT T; HAYGOOD JR WILLIAM T
权利人:EXXONMOBIL CHEM PATENTS INC
摘要:The present invention relates to ligands and the synthesis of those ligands for use in metallocene complexes. More particularly, the present invention relates to the synthesis of diarylsilyl bridged biscyclopentadienes using diarylsilyldisulfonates. Even more particularly, the present invention describes Group IV metallocenes containing diarylsilyl bridged bis-cyclopentadienyl ligands prepared from contacting a diarylsilyldisulfonate with an organometallic indenyl reagent.