CONFORMATIONAL STABILITY ORDER OF ACYCLIC ORGANIC MOLECULES REVISITED: A COMPUTER-BASED PROJECT IN LEARNING STEREOCHEMISTRY
Journal Title: Periódico Tchê Química - Year 2017, Vol 14, Issue 28
Abstract
Learning stereochemistry today, especially on the topic of conformational stability, seems to generalize anti, gauche, eclipsed conformations as a general stability order for all acyclic organic molecules. This may be due to the fact that many organic chemistry textbooks only emphasis simple non-polar molecules, like propane or buthane, as examples to explain this topic omitting details for polar ones. This study proposes a simple computer-based technique as a project for students in learning stereochemistry. Applying this fast, open-source, and user-friendly software is highly recommended for promoting the concept and accurately predicting of conformational stability through computer-assisted experiment in the classroom.
USE OF MONTE CARLO SIMULATIONS FOR THE CALCULATION OF THE UNCERTAINTY ESTIMATE IN THE ELECTROCHEMICAL DETECTION OF URIC ACID IN PLASMA SAMPLES
This work presents a low cost, simple and adequately reliable electrochemical alternative for the determination of uric acid in human serum in comparison to the enzymatic colorimetric reference method. The quality of the...
STUDY OF THE FEATURES OF GAS FLOW BEHIND THE VORTEX BURNER OF THE COMBUSTION CHAMBER OF AN AIRCRAFT GAS TURBINE ENGINE
Currently, gas turbine engines are increasingly used as power units in the power industry, oil and gas industries, i.e., the process of converting aircraft gas turbine engines that have exhausted their flying resource in...
HYDROCHEMICAL CHARACTERIZATION OF URBAN SPRING WATERS FROM TIJUCO STREAM, SUB-BASIN OF RIBEIRÃO DO ONÇA, CENTRAL-NORTH REGION OF BELO HORIZONTE
This work focuses on drawing up the hydrochemical profile of water samples collected in five springs of the Tijuco stream. The evaluation was based on quantification of the elements Al, As, Ba, Be, B, Ca, Cd, Co, Cr, Li,...
IDEAS OF STUDENTS ON THE ATOMISTIC NATURE OF MATTER
The alternative concepts movement that emerged in the 1970s continues to be highly relevant in the teaching of sciences, particularly chemistry, given that it can be the starting point for teachers to revisit their pedag...
QUALITATIVE ANALYSIS OF THE COMPOSITION NON-VOLATILE BRAZILIAN WHOLE GRAPE JUICES USING QEXACTIVE™ (HYBRID QUADRUPOLE-ORBITRAP MASS SPECTROMETER) AND PRINCIPAL COMPONENT ANALYSIS (PCA)
The main constituents of grape juice are non-volatile compounds and are responsible, in most cases, the organoleptic characteristics of the product, particularly flavor and color, attributes related to quality and accept...