4,5,12,13-Tetrabromo[2.2]paracyclophane - A New Bis(aryne) Equivalent

The reaction of 2 with nBuLi at -78°C generates aryne intermediates within the aromatic rings of [2.2]paracyclophane which are trapped in Diels-Alder reactions with dienes like furan, 1,9-diphenylisobenzofuran, or cyclopentadiene. Reductive deoxygenation with low-valent titanium reagents or TMSI converts the adducts of furan and isobenzofuran into anti-[2.2]paracyclophanes 4 and 5, respectively. The reaction of two aryne intermediates with [2.2](2,5)furanophane (7) yields 8 with three [2.2]paracyclophane units arranged in a stair-like fashion; yet, in this compound the highly shielded oxygen atoms cannot be removed anymore by reduction

The Ursinus Weekly, July 26, 1943

Navy men battle Curtis clouters as season opens • Penn names Kellett basketball head • Nearly 350 students and sailors enroll for sixteen-week semester • Summer assembly meets August 2-9 • Day studies redecorated girls help to make changes • Curtain Club prepares for coming season • Students recondition courts in preparation for tennis • Weekly to be monthly for summer term • Sophs begin frosh initiation • Y\u27s sponsor weekly dances; rec center is opened • Staiger and Mann appointed as instructors in science • Navy trainees lead busy life as V-12 program commenceshttps://digitalcommons.ursinus.edu/weekly/1713/thumbnail.jp

[2.2](4,7)Isobenzofuranophanes - Synthesis, Characterisation and Reactivity

The isomeric Diels-Alder adducts 3, obtained by cycloaddition of tetraphenylcyclopentadienone to the 4,5:12,13-bis-(oxanorbornadieno)[2.2]paracyclophanes syn,syn- and anti,-syn-2[Note ][The stereochemical descriptors syn and anti refer to the orientation of the oxygen bridge in the oxabicyclo[2.2.1]heptadiene subunits with respect to the [2.2]paracyclophaneskeleton.], yield the unstable isobenzofuranophane 4 by consecutive extrusion of carbon monoxide and tetraphenylbenzene when heated to 180°C. The molecular ion of 4 was observed in the EI mass spectrum. The stable tetraphenyl-substituted analogue 10 was synthesized independently from the previously unknown 4,5,12,13-tetrabenzoyl[2.2]paracyclophane (9). UV/Vis as well as fluorescence spectra and an X-ray crystal structure analysis of 9 are reported

Choosing Sides: Children’s Expectations of Consequences of Loyalty Towards Authority

Previous research has found that children recognize social group membership and status early in development (Aboud, 2003; Gulgoz & Gelman, 2017). However, children increasingly value loyalty towards authority figures with age, although they prefer members of their own social groups (Norris & Noles, 2022). In this study, we are interested in whether children expect there to be positive consequences associated with loyalty towards authority figures over a subordinate, as well as negative consequences associated with loyalty towards subordinates over authority figures. We presented children ages 6-8, as well as adults, with a situation in which a worker was loyal to either the boss (authority figure) or another worker (subordinate). We then asked two questions: whether the boss was nice to the (dis)loyal worker (Positive Consequence) or mean to them (Negative Consequence). Both children and adults significantly chose the worker to receive a negative consequence when the worker was loyal to the subordinate as well as to receive a positive consequence when the worker was loyal to the boss. These results suggest that at a young age, children recognize that risks are associated with loyalty towards authority figures over in-group members. Future studies should further explore how loyalty influences the way children interact in relationships with friends, parents, and teachers

Ueber die Wirkung von Kainit und Thomasschlacke auf Grund der auf der Versuchsfarm Peterhof gemachten Erfahrungen und der dort angestellten Düngungsversuche

http://www.ester.ee/record=b4004662*es

Spicilegium observationum de Arnica montana : dissertatio inauguralis medica

http://tartu.ester.ee/record=b1900065~S1*es

Bericht über die Internationale Ausstellung von Samen-Reinigungs-, Sortir- und Trockenmaschinen Apparaten und Geräthen in St. Petersburg 2.14. bis 16.28. März des Jahres 1894

Digiteeritud Euroopa Regionaalarengu Fondi rahastusel, projekti "Eesti teadus- ja õppekirjandus" (2014-2020.12.03.21-0848) raames.https://www.ester.ee/record=b4004687*es

Bischof v. Pauffler : ein Lebensbild

http://www.ester.ee/record=b3889004*es

Ueber das Verhalten der im Säugethierkörper als Vorstufen des Harnstoffes erkannten Verbindungen zum Organismus der Hühner : Inaugural-Dissertation zur Erlangung des Grades eines Doctors der Landwirthschaft verfasst und mit Genehmigung Einer Hochverordneten Physiko-mathematischen Facultät der Kaiserlichen Universität zu Dorpat zur öffentlichen Vertheidigung bestimmt

http://tartu.ester.ee/record=b1953954~S1*es