Polymer semiconductors incorporating head-to-head linked 4-alkoxy-5-(3-alkylthiophen-2-yl)thiazole

Cyclization of 5-hexynoic acid to 3-alkoxy-2-cyclohexenones

The one-pot cyclization of 5-hexynoic acid to produce 3-alkoxy-2-cyclohexenones proceeds in good yields (58-90%). 3-Hexynoic acid was converted to its acyl chloride with the aid of oxalyl chloride and was cyclized to 3-chloro-2-cyclohexenone upon addition of indium(III) chloride. Subsequent addition of alcohol nucleophiles led to the desired 3-alkoxy-2-cyclohexenones.

1 Running head : UPWARD COMPARISONS IN THE CLASSROOM 2 3 4 5

2 Studies investigating social comparison in the classroom have lead to contradictory results 3 concerning upward comparison effects. Research demonstrates that they can lead either to 4 enhancing student’s academic performance without influencing his/her self-concept or to 5 decreasing student’s academic self-concept through Big-Fish-Little-Pond Effect (i.e., BFLPE) 6 . Our study tries to reco...

Running Head : Classification Error & LPI error 1 2 3 4 5 6 7 8 9

5 Years Epidemiologic Study of Head Injury

There is limited research about head injury. In this existing data study, 2443 admission records of 28367 patients that confer to Loghman Medical Center from 1986-1991 were analyzed. Several factors including age, sex, type and cause of injury, mortality and morbidity were investigated. Overall, the most common age group were 20-40 years, but the most common age group in female patients were 3-...

Theory of hypothetical ferroelectric superlattices incorporating head-to-head and tail-to-tail 180° domain walls

While electrical compatibility constraints normally prevent head-to-head HH and tail-to-tail TT domain walls from forming in ferroelectric materials, we propose that such domain walls could be stabilized by intentional growth of atomic layers in which the cations are substituted from a neighboring column of the periodic table. In particular, we carry out predictive first-principles calculations...