scholarly journals Coseismic, dilational-fault and extension-fracture related pit chain formation in Iceland: Analog for pit chains on Mars

Lithosphere ◽  
2011 ◽  
Vol 3 (2) ◽  
pp. 133-142 ◽  
Author(s):  
David A. Ferrill ◽  
Danielle Y. Wyrick ◽  
Kevin J. Smart
Keyword(s):  
Chain Formation ◽  
Extension Fracture

scholarly journals Theoretical Model of Polymer Network Chain Formation under Strain

ACS Omega ◽  
2018 ◽  
Vol 3 (11) ◽  
pp. 15615-15622 ◽  
Author(s):  
Yong Yu ◽  
Shunping Yan ◽  
Ye Fang ◽  
Qinshu He ◽  
Huyi Wang ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Polymer Network ◽  
Chain Formation ◽  
Network Chain

An integration of bidding-oriented product conceptualization and supply chain formation

2008 ◽  
Vol 59 (2-3) ◽  
pp. 128-144 ◽  
Author(s):  
Wei Yan ◽  
Chun-Hsien Chen ◽  
Youfang Huang ◽  
Weijian Mi
Keyword(s):  
Supply Chain ◽  
Chain Formation ◽  
Supply Chain Formation

scholarly journals Some chalcones derived from thiophene-3-carbaldehyde: synthesis and crystal structures

2019 ◽  
Vol 75 (7) ◽  
pp. 957-963 ◽  
Author(s):  
Trung Vu Quoc ◽  
Duong Tran Thi Thuy ◽  
Thuan Dang Thanh ◽  
Thanh Phung Ngoc ◽  
Vuong Nguyen Thien ◽  
...  
Keyword(s):  
Potassium Hydroxide ◽  
Thiophene Ring ◽  
Three Dimensional ◽  
Ethanol Solution ◽  
Molecular Structures ◽  
Chain Formation ◽  
Axis Direction ◽  
Crystal And Molecular Structures ◽  
Phenyl Rings ◽  
Thiophene Derivatives

The synthesis, spectroscopic data and crystal and molecular structures of four 3-(3-phenylprop-1-ene-3-one-1-yl)thiophene derivatives, namely 1-(4-hydroxyphenyl)-3-(thiophen-3-yl)prop-1-en-3-one, C13H10O2S, (1), 1-(4-methoxyphenyl)-3-(thiophen-3-yl)prop-1-en-3-one, C14H12O2S, (2), 1-(4-ethoxyphenyl)-3-(thiophen-3-yl)prop-1-en-3-one, C15H14O2S, (3), and 1-(4-bromophenyl)-3-(thiophen-3-yl)prop-1-en-3-one, C13H9BrOS, (4), are described. The four chalcones have been synthesized by reaction of thiophene-3-carbaldehyde with an acetophenone derivative in an absolute ethanol solution containing potassium hydroxide, and differ in the substituent at the para position of the phenyl ring: –OH for 1, –OCH3 for 2, –OCH2CH3 for 3 and –Br for 4. The thiophene ring in 4 was found to be disordered over two orientations with occupancies 0.702 (4) and 0.298 (4). The configuration about the C=C bond is E. The thiophene and phenyl rings are inclined by 4.73 (12) for 1, 12.36 (11) for 2, 17.44 (11) for 3 and 46.1 (6) and 48.6 (6)° for 4, indicating that the –OH derivative is almost planar and the –Br derivative deviates the most from planarity. However, the substituent has no real influence on the bond distances in the α,β-unsaturated carbonyl moiety. The molecular packing of 1 features chain formation in the a-axis direction by O—H...O contacts. In the case of 2 and 3, the packing is characterized by dimer formation through C—H...O interactions. In addition, C—H...π(thiophene) interactions in 2 and C—H...S(thiophene) interactions in 3 contribute to the three-dimensional architecture. The presence of C—H...π(thiophene) contacts in the crystal of 4 results in chain formation in the c-axis direction. The Hirshfeld surface analysis shows that for all four derivatives, the highest contribution to surface contacts arises from contacts in which H atoms are involved.

Carbon-atom chain formation in the core of nanotubes

2000 ◽  
Vol 61 (4) ◽  
pp. R2472-R2474 ◽  
Author(s):  
Zhenxia Wang ◽  
Xuezhi Ke ◽  
Zhiyuan Zhu ◽  
Fengshou Zhang ◽  
Meiling Ruan ◽  
...  
Keyword(s):  
Carbon Atom ◽  
Chain Formation ◽  
The Core ◽  
Atom Chain
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