A Mixed-Aldol Condensation Reaction with Unknown Aldehydes and Ketones: Employing Modern Methods To Improve the Learning Process for Second-Year Undergraduate Organic Chemistry Students

2013 ◽  
Vol 90 (8) ◽  
pp. 1100-1102 ◽  
Author(s):  
Amy M. Balija ◽  
Aileen M. Reynolds
Keyword(s):  
Organic Chemistry ◽  
Learning Process ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Chemistry Students ◽  
Modern Methods ◽  
Aldehydes And Ketones ◽  
Second Year

scholarly journals Preparation of two different crystal structures of cerous phosphate as solid acid catalysts: their different catalytic performance in the aldol condensation reaction between furfural and acetone

RSC Advances ◽  
2019 ◽  
Vol 9 (30) ◽  
pp. 16919-16928 ◽  
Author(s):  
Wenzhi Li ◽  
Mingxue Su ◽  
Tao Yang ◽  
Tingwei Zhang ◽  
Qiaozhi Ma ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Liquid Fuel ◽  
Solid Acid ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Catalytic Performance ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Aldehydes And Ketones ◽  
Aldol Condensation Reactions

Liquid fuel intermediates can be produced via aldol condensation reactions through furan aldehydes and ketones driven from biomass.

Organic chemistry students' fragmented ideas about the structure and function of nucleophiles and electrophiles: a concept map analysis

2016 ◽  
Vol 17 (4) ◽  
pp. 1019-1029 ◽  
Author(s):  
Mary E. Anzovino ◽  
Stacey Lowery Bretz
Keyword(s):  
Organic Chemistry ◽  
Reaction Mechanisms ◽  
Concept Map ◽  
Structure And Function ◽  
Cognitive Map ◽  
Chemistry Students ◽  
Second Year ◽  
And Function ◽  
Map Analysis

Organic chemistry students struggle with multiple aspects of reaction mechanisms and the curved arrow notation used by organic chemists. Many faculty believe that an understanding of nucleophiles and electrophiles, among other concepts, is required before students can develop fluency with the electron-pushing formalism (EPF). An expert concept map was created to depict an understanding of nucleophiles and electrophiles ideally held by undergraduates. Second year organic chemistry students were interviewed and asked to give examples of nucleophiles and electrophiles and to identify them in reactions. A cognitive map was created to represent each student's understanding. The students' maps were compared to the expert map, revealing that students possess fragmented ideas about the structure and function of nucleophiles and electrophiles.

scholarly journals Nonanal Sensor Fabrication Using Aldol Condensation Reaction Inside Alkali-Resistant Porous Glass

2021 ◽  
pp. 1-1
Author(s):  
Masato Tsujiguchi ◽  
Takashi Aitoku ◽  
Hironori Takase ◽  
Yasuko Yamada Maru
Keyword(s):  
Porous Glass ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Sensor Fabrication

Liquid-phase aldol condensation of cyclohexanone on aluminium and iron oxides

1982 ◽  
Vol 47 (8) ◽  
pp. 2235-2245 ◽  
Author(s):  
Zdeněk Vít ◽  
Lubomír Nondek ◽  
Jaroslav Málek
Keyword(s):  
Iron Oxides ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Complex Function ◽  
Acid Sites ◽  
Basic Site ◽  
Catalyst Poisoning ◽  
Iron Hydroxides ◽  
Transient Complex ◽  
Kinetics Of

The kinetics of the aldol condensation of cyclohexanone in decalin were investigated at 210 °C on catalysts prepared by drying and calcining the aluminium and iron hydroxides at 110-850 °C. The effect of catalyst poisoning by benzoic acid and pyridine on the course of the condensation reaction and aldol retroaldolisation was also examined. The kinetics of the cyclohexanone condensation can be described by means of Langmuir-Hinshelwood equations which are in agreement with a mechanism involving adsorption of cyclohexanone on a basic site to form a transient complex, reaction of this complex with a cyclohexanone molecule affording the aldol, the rate determining interaction of the aldol with free basic and acid sites yielding 2-(1-cyclohexen-1-yl)cyclohexanone and water and desorption of these products from the catalyst surface. The proposed kinetic model is supported by the results of catalyst poisoning. The activity of aluminium and iron oxides in the condensation of cyclohexanone is a complex function of their basicity and acidity depending strongly on the calcination temperature.

Blended learning in a second year organic chemistry class: students’ perceptions and preferences of the learning support

2020 ◽  
Vol 21 (1) ◽  
pp. 24-36 ◽  
Author(s):  
Rethabile Tekane ◽  
Lynne A. Pilcher ◽  
Marietjie Potgieter
Keyword(s):  
Organic Chemistry ◽  
Blended Learning ◽  
Language Proficiency ◽  
Discussion Board ◽  
Unique Contribution ◽  
Learning Support ◽  
Student Body ◽  
Individual Interviews ◽  
The Face ◽  
Second Year

Although the implementation of blended learning in organic chemistry is rapidly growing, thus far, there are few studies published on the evaluation of supplemental types of blend in organic chemistry. This report covers a phenomenographic study that was designed to evaluate a supplemental type of blended learning approach implemented in a second-year organic chemistry course in a South African context. It offers a unique contribution in terms of catering to the needs of a diverse student body. Three open-ended questionnaires were used to probe: (1) students’ perceptions of the learning support; (2) students’ preferences for different types of learning support offered; and (3) students’ suggestions for improvement. Semi-structured individual interviews were used to obtain clarity on some of the responses from the questionnaires. Analysis of students’ responses revealed that the face-to-face component was highly valued as it gave the students the opportunity to ask questions and obtain answers in real time; the online component, especially Learnsmart, was found helpful for its flexibility and providing limitless opportunities to practice or revisit concepts. The discussion board was the least valued due to the overwhelming number of postings, and the students felt they were forced to participate in order to get marks. The students experienced the course as too fast-paced possibly reflecting cognitive overload, a potential weakness of the supplemental blend. The findings will be useful in many other contexts where the student body is diverse in terms of language proficiency and the level of preparation for the demands of organic chemistry as a discipline.

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