Competition between α, β, and γ Polymorphs in a β-Nucleated Metallocenic Isotactic Polypropylene
نویسندگان
چکیده
منابع مشابه
Organocatalytic asymmetric Michael-type reaction between β,γ-unsaturated α-keto ester and α-nitro ketone.
A Michael-type reaction of β,γ-unsaturated α-keto ester and α-nitro ketone was established. With a thiourea catalyst derived from cinchona alkaloid, the reactions afford products in 47-94% yields with 68-96% ee.
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Highly efficient DABCO-catalyzed [4 + 2] cycloaddition of β,γ-unsaturated α-ketophosphonates or β,γ-unsaturated α-ketoesters with allenic esters gives the corresponding highly functionalized tetrahydropyran and dihydropyran derivatives in good to excellent yields and moderate to good regioselectivities under mild conditions.
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Article history: Phase relations in α–β–γ M Received 31 October 2007 Received in revised form 3 June 2008 Accepted 11 June 2008 Available online 26 June 2008 Editor: R.D. van der Hilst
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In this paper we introduce $(alpha,beta)-$linear connected spaces for nonzero cardinal numbers $alpha$ and $beta$. We show that $(alpha,beta)-$linear connectivity approach is a tool to classify the class of all linear connected spaces.
متن کاملStructure reinvestigation of α-, β- and γ-In2S3
Semiconducting indium sulfide (In2S3) has recently attracted considerable attention as a buffer material in the field of thin film photovoltaics. Compared with this growing interest, however, detailed characterizations of the crystal structure of this material are rather scarce and controversial. In order to close this gap, we have carried out a reinvestigation of the crystal structure of this ...
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ژورنال
عنوان ژورنال: Macromolecules
سال: 2007
ISSN: 0024-9297,1520-5835
DOI: 10.1021/ma0710636