8 Watson International Ltd Uni

watson international ltd is the earliest developer ofxantphos and the largest manufacturer globally.our clients include ge, p&g, siemens, sony, pfizer, merck, astrazeneca, sigma-aldrich, tci and so on.

watson international ltd' has a very strong r&d and technical capacity supported by fcad's platform. the subsidiaries under fcad group have accumulated much know-how of different fine chemical branches. for example, apnoke scientific ltd is the expert in amino acid and peptide, ulcho biochemical ltd focuses on carbohydrate and nucleotide, caming pharmaceutical ltd develops new technology for pharmaceutical chemicals and warshel chemical ltd is the expert of advanced materials and performance chemicals including catalysts, resins, electronic chemicals and agrochemicals.

fcad helps clients from different fields to develop their required fine chemicals or formulations. from pharmaceutical materials to diagnostic reagents, cruing agent to construction chemicals, photographic formulations to electronic intermediates, cosmetics ingredients to flavors, fcad and the subsidiaries try to achieve high quality by the most economic route. our clients include ge, p&g, siemens, sony, pfizer, merck, astrazeneca, sigma-aldrich, tci and so on.

we are constantly upgrading every aspect of our quality systems in terms of staff training, documentation and analytical capabilities to achieve the highest levels possible. the quality of our products is one of our most significant assets. we constantly seek ways to improve our quality systems and welcome any suggestions from our customers or regulatory groups on how to do this. we have the following procedures in our quality systems to monitor the quality of products throughout the whole manufacturing process and even up to inventory.

mature product line ensures of stability of production and many products with different levels of stock or intermediate inventory enable us to meet your needs quickly. watson understands every provided product's shipment and storage conditions and will use professional packages and labels regularly or per customer's request.

mature product line with the industrialization of the production process allows us to effectively control costs and offer you the best price. we are also optimizing the current route of our products to make it possible of costing down for future needs. and in order to serve customers such as universities, r&d institutions, labs and non-profit organizations, watson accepts multiple payment methods including wire transfer, paypal, alibaba escrow, western union, moneygram or even bitcoin.

Details

Identification CAS Number

161265-03-8

Name

Xantphos

Synonyms

(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine)

base induced fragmentation of (vii), as shown, took place readily with dimsyl sodium in dimethyl sulphoxide (6) to give a ketone, cllh180, whose spectroscopic properties showed it to be an isopropenyl- dimethyl-cyclohe:wnone (viii)。 2.15分子式为 c8h１8 的烷烃与氯在紫外光照射下反应，产物中的一氯代烷只有一种，写出这个烷烃的结 答案：2.16 将下列游离基按稳定性由大到小排列： 答案：稳定性c>a>b第三章不饱和烃 3.1 用系统命名法命名下列化合物 答案：a.2－乙基－１－丁烯 ２－ethyl－1－butene b.2－丙基－１－己烯 ２－propyl－1－hexene c.3,5－二甲基－３－庚烯 3,5－dimethyl－3－heptene d.2,5－二甲基－２－己烯 2,5－dimethyl－2－hexene 3.2 写出下列化合物的结构式或构型式，如命名有误，予以更正。α-异戊烯 题外补充：c5h10 的同分异构体除了以上6 种烯烃，还有以下6 种环烷烃： 环戊烷 cyclopentane 甲基环丁烷 methyl cyclobutane 顺式-1,2-二甲基环丙烷 (z)-1,2-dimethyl cyclopropane 反式-1,2-二甲基环丙烷 (e)-1,2-dimethyl cyclopropane 1,1-二甲基环丙烷 1,1-dimethyl cyclopropane 乙基环丙烷 ethyl-cyclopropane 3.4 用系统命名法命名下列键线式的烯烃，指出其中的 sp2 sp3杂化碳原子。

phosphine, 1,1′-(9,9-dimethyl-9H-xanthene-4,5-diyl)bis[1,1-diphenyl-

Xanthene, 4,5-bis(diphenylphosphino)-9,9-dimethyl-

Xantphos

4,5-Bis(diphenylphosphino)-9,9-dimethylxanthene

4,5-Bis(diphenylphospheno)-9,9-dimethylxanthene

4,5-Bis(diphenylphosphino)-9,9-dimethyl-9H-xanthene

4,5-Bis(diphenylphosphino)-9,9-dimethylxanthene

9,9-Dimethy-4,5-bis(diphenylphosphino)xanthene

9,9-dimethyl-4,5-bis(diphenylphosphino)

9,9-dimethyl-4,5-bis(diphenylphosphino)-9H-xanthene

9,9-Dimethyl-4,5-bis(diphenylphosphino)xanthene

dimethylbisdiphenylphosphinoxanthene

Molecular Structure SMILES

O6c1c(cccc1P(c2ccccc2)c3ccccc3)C(c7cccc(P(c4ccccc4)c5ccccc5)c67)(C)C

StdInChI

2017030期双色球心水10码：6,13,17,24,26,27,28,30,31,33。2017120期 杀6,8,11,14,20,21,24,30,31,33 错 开8、10、15、19、23、28+16。16红：1,4,5,6,9,12,14,20,23,24,26,27,28,30,31,33。01 03 04 05 07 09 11 13 15 17 19 20 21 23 25 27 28 30 31 33 3842 46 48 49。

StdInChIKey

CXNIUSPIQKWYAI-UHFFFAOYSA-N

MDL Number

MFCD00233866

Molecular Formula

C39H32OP2

Molecular Weight

578.63

Properties Appearance