SciELO - Scientific Electronic Library Online

 
vol.22 issue4Production of electrolytic manganese dioxide for usage in lithium batteriesEvaluating approaches employed in Physical Chemistry teaching author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064

Abstract

BIEBER, Lothar W.. Experimental organic Chemistry: integration of theory, experiment and analysis. Quím. Nova [online]. 1999, vol.22, n.4, pp.605-610. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40421999000400020.

A new approach for teaching in basic experimental organic chemistry is presented. Experimental work goes on parallel to theoretical lectures leading to an immediate application of theoretical concepts transmitted therein. One day/week is dedicated exclusively to the organic laboratory. Reactions are proposed as problems to be solved; the student has to deduce the structure of the product on the basis of his observations, the analytical data and his mechanistical knowledge. 70 different experiments, divided in 7 thematical chapters, are presented. All experiments require the analysis and discussion of 1H and 13C NMR, IR and UV spectra. Additional questions about each reaction have to be answered by the student in his written report. Laboratory safety is garanteed by the exclusion or substitution of hazardous and toxic reagents. Microscale preparations are adopted in most cases to lower the cost of materials and the amount of waste. Recycling of many reaction products as starting materials in other experiments reduces the need for commercial reagents and allows the execution of longer reaction sequences. Only unexpensive standard laboratory equipment and simple glassware are required. All experiments include instructions for the save treatment or disposal of chemical waste.

Keywords : complementary theoretical and experimental teaching; unknown results; interpretation of analytical data.

        · text in Portuguese

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License