An Estimation of Average Polynuclear Aromatic Ring Size in an Iowa Vitrain and a Virginia Vitrain

1981 ◽  
pp. 15-22 ◽  
Author(s):  
B. C. GERSTEIN ◽  
L. M. RYAN ◽  
P. DUBOIS MURPHY
Keyword(s):  
Aromatic Ring ◽  
Ring Size

scholarly journals The effect of aromatic ring size in electron deficient semiconducting polymers for n-type organic thermoelectrics

2020 ◽  
Vol 8 (43) ◽  
pp. 15150-15157
Author(s):  
Maryam Alsufyani ◽  
Rawad K. Hallani ◽  
Suhao Wang ◽  
Mingfei Xiao ◽  
Xudong Ji ◽  
...  
Keyword(s):  
Aromatic Ring ◽  
Semiconducting Polymers ◽  
Ring Size ◽  
Thermoelectric Devices ◽  
Device Stability ◽  
Electrical Conductivities ◽  
P Type

N-type semiconducting polymers have been recently utilized in thermoelectric devices, however they have typically exhibited low electrical conductivities and poor device stability, in contrast to p-type semiconductors, which have been much higher performing.

Development of aromatic ring size in bituminous coals during heat treatment in the plastic temperature range

2004 ◽  
Vol 85 (8-10) ◽  
pp. 827-835 ◽  
Author(s):  
Koh Kidena ◽  
Koji Matsumoto ◽  
Misa Katsuyama ◽  
Satoru Murata ◽  
Masakatsu Nomura
Keyword(s):  
Heat Treatment ◽  
Aromatic Ring ◽  
Ring Size ◽  
Temperature Range ◽  
Bituminous Coals

Non-aromatic endocyclic angle at the ring fusion with the aromatic ring in benzocyclopentene and -hexene, revisited

2004 ◽  
Vol 60 (3) ◽  
pp. 293-299
Author(s):  
Dirk J. A. De Ridder ◽  
Hans-Beat Bürgi
Keyword(s):  
Bond Length ◽  
Aromatic Ring ◽  
Cambridge Structural Database ◽  
Mirror Plane ◽  
Ring Size ◽  
Acta Cryst ◽  
Ring Fusion ◽  
X Ray ◽  
Fused Ring ◽  
Structural Database

X-ray geometries of monocycloalkenobenzenes with a fused-ring size of r = 5, 6 were obtained by the use of the Cambridge Structural Database. In contrast to Allen's study [Acta Cryst. (1981), B37, 900–906], the data were not averaged over exact or imposed m ad symmetry (m ad is the mirror plane going through the midpoint of the aromatic ring fusion bond and the aromatic bond parallel to it). The distribution of the non-aromatic endocyclic angle ∊ at the ring fusion clearly shows two and three, respectively, distinct curves for r = 5 and r = 6. The respective ranges are 104.3–112.6 and 104.4–123.2°. If one of the C atoms directly attached to the aromatic ring is sp 2 hybridized, the bond length e between the aromatic ring and this atom is shortened by some 0.044 (15) and 0.027 (12) Å for r = 5 and r = 6, respectively. However, for r = 5, e is only shortened by 0.030 (17) Å when both C atoms directly attached to the aromatic ring are sp 2 hybridized. For r = 5, the endocyclic angle ∊ is 1.2 (13)° smaller at the side involving the sp 2 hybridized C atom.

Aromatic ring size effects on the photophysics and photochemistry of styrylbenzothiazole

2013 ◽  
Vol 12 (7) ◽  
pp. 1220 ◽  
Author(s):  
Mohamed K. Awad ◽  
Morad M. El-Hendawy ◽  
Tarek A. Fayed ◽  
Safaa Eldin H. Etaiw ◽  
Niall J. English
Keyword(s):  
Aromatic Ring ◽  
Size Effects ◽  
Ring Size

Ring size effect in McMurry cyclization of 1,ω-di((azulen-1-yl)-carbonyl) alkanes

2020 ◽  
Vol 65 (1) ◽  
pp. 83-88
Author(s):  
Eugenia Andreea DRAGU ◽  
◽  
Alexandru C. RAZUS ◽  
Keyword(s):  
Size Effect ◽  
Ring Size
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