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Monitoring the catalysed formation of polyurethane prepolymer indicated by developing carbonyl carbon oxygen double bond stretching frequency at 1735cm-1 |
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Monitoring the non-catalysed formation of polyurethane prepolymer indicated by developing carbonyl carbon oxygen double bond stretching frequency at 1735cm-1 |
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(zoom in of Example 1) Monitoring the catalysed formation of polyurethane prepolymer indicated by developing carbonyl carbon oxygen double bond stretching frequency at 1735cm-1 |
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Monitoring the progress of a Paal-Knorr synthesis at 60 degrees centigrade by the disappearance of the carbonyl oxygen double bond stretching frequency at 1713cm-1 originating from the diketone |
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Monitoring the progress of a Paal-Knorr pyrrole synthesis at zero degrees centigrade by the disappearance of the carbonyl oxygen double bond stretching frequency at 1713cm-1 originating from the diketone |
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Monitoring the progress of a Paal-Knorr pyrrole synthesis at 60 degrees centigrade by the disappearance of the carbonyl oxygen double bond stretching frequency at 1713cm-1 originating from the diketone |
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(zoom in of Example 6) Monitoring the progress of a Paal-Knorr pyrrole synthesis at 15 degrees centigrade by the disappearance of the carbonyl oxygen double bond stretching frequency at 1713cm-1 originating from the diketone |
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Monitoring the progress of a Paal-Knorr pyrrole synthesis at 15 degrees centigrade by the disappearance of the ethanolamine peak at 1165cm-1 and the formation of the C-N stretching frequency of the pyrrole at 1280cm-1 |
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