Tetrahedrane cluster and phosphorus ligand activation in the reaction between PhCCo3(CO)9 and 2,3-bis(diphenylphosphino)maleic anhydride. Molecular structure of Co3(Co)6(μ2-η2-η1-(O))(μ2-PPh2)

1993 ◽  
Vol 212 (1-2) ◽  
pp. 1-3 ◽  
Author(s):  
Yang Kaiyuan ◽  
Janna M. Smith ◽  
Simon G. Bott ◽  
Michael G. Richmond
Keyword(s):  
Molecular Structure ◽  
Maleic Anhydride ◽  
Ligand Activation

Einfache Synthese von 2,2-Diethoxy-2,5-dihydrofuranen, 2(5 H)Furanonen und 2-Ethoxy-furanen.Kristall-und Molekülstruktur eines Barrelenon Diels-Aider Produktes [1] / Convenient Synthesis of 2,2-Diethoxy-2,5-dihydrofurans, 2(5 H)Furanones and 2-Ethoxyfurans.Crystal and Molecular Structure of a Barrelenone Diels-Alder Product [1]

1994 ◽  
Vol 49 (3) ◽  
pp. 389-406 ◽  
Author(s):  
Rolf W. Saalfrank ◽  
Wieland Hafner ◽  
Joachim Markmann ◽  
Andreas Welch ◽  
Karl Peters ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Maleic Anhydride ◽  
Structure Analysis ◽  
Diels Alder ◽  
Dimethyl Acetylenedicarboxylate ◽  
Reaction Conditions ◽  
X Ray ◽  
Convenient Synthesis

AbstractReaction of 1,2-hydroxyketones 5 with (2,2-diethoxyvinylidene)triphenylphosphorane (2) or (2,2-diethoxyvinyl)triphenylphosphonium tetrafluoroborates 6 yields the 2,2-diethoxy- 2.5-dihydrofurans 9. Depending on the reaction conditions used, the orthoesters 9 can be hydrolized to give 2(5 H)furanones 10 and 2-ethoxyfurans 11, respectively. 4,5-Dimethyl- 5.6-dihydro-2-pyranone (20) and 8-methoxycoumarin (23) are prepared, starting from (2,2-diethoxyvinyl)triphenylphosphonium tetrafluoroborate (6 a) and 1-hydroxy-2-methyl- 3-butanone (16) or 2-hydroxy-3-methoxy-benzaldehyde (21). The 2-ethoxyfuranes 11 readily undergo Diels-Alder reactions with 2-chloracrylonitrile (24), maleic anhydride (26), N-phenyl-1,2,4-triazoline-3,5-dione (28) and dimethyl acetylenedicarboxylate (30) to give the corresponding Diels-Alder products 25, 27, 29 and 31, respectively. Contrary to 2-ethoxyfuran 11b , 11a reacts with two equivalents of acetylene 30, to yield barrelenone 34. The structure of 34 unequivocally is established by X-ray structure analysis.

Preparation of Hyper-Branched Polymer and its Application in Synthetic Leather

2010 ◽  
Vol 152-153 ◽  
pp. 1894-1899
Author(s):  
Tao Tao Qiang ◽  
Min Luo ◽  
Xue Chuan Wang ◽  
Long Fang Ren
Keyword(s):  
Molecular Structure ◽  
Electron Microscope ◽  
Water Vapor ◽  
Maleic Anhydride ◽  
Moisture Absorption ◽  
Branched Polymer ◽  
Synthetic Leather ◽  
Finishing Process ◽  
Scanning Electron ◽  
Observation Results

The hyper-branched polymer with terminal carboxyl (HPAE-C) was prepared by modifying hyper-branched polymer with terminal hydroxyl with maleic anhydride. The molecular structure of HPAE-C was characterized by IR, 1H-NMR and 13C-NMR. The HPAE-C was used in the finishing process of microfiber synthetic leather, and its effect on the health properties of microfiber synthetic leather was studied. The results showed that hyper-branched polymer could improve the moisture absorption and permeability to water vapor of microfiber synthetic leather. When the dosage of HPAE-C was 8%, the permeability to water vapor and moisture absorption of microfiber synthetic leather were improved by 7% and 13%, respectively. The observation results obtained by using scanning electron microscope showed that HPAE-C could loose the fibers of synthetic leather.

Synthesis and Characterization of Maleic Anhydride Grafted Polypropylene with a Well-Defined Molecular Structure

2013 ◽  
Vol 46 (11) ◽  
pp. 4313-4323 ◽  
Author(s):  
Min Zhang ◽  
Ralph H. Colby ◽  
Scott T. Milner ◽  
T. C. Mike Chung ◽  
Tianzi Huang ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Maleic Anhydride ◽  
Synthesis And Characterization

The molecular structure of (1,5-hexadiene)(maleic anhydride)Pt(O)

1988 ◽  
Vol 150 (1) ◽  
pp. 5-8 ◽  
Author(s):  
G.Bennett Stackhouse ◽  
Laura L. Wright
Keyword(s):  
Molecular Structure ◽  
Maleic Anhydride
Sign in / Sign up

Export Citation Format

Share Document