Category Archives: Labs

Models for Learning about Electrostatic Potential Maps

The models you need can be downloaded here: ions321inter.spartan neutrals321inter.spartan

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Ethanol IR models

Click on the link to download a Spartan EDF2/6-31G** model of ethanol monomer and ethanol dimer. The models have been combined in a single file (a ‘list’ model) and they already contain calculated IR spectra, so do not replace them … finish reading Ethanol IR models

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Lab Grades

Nearly all of the lab reports have been graded so you can expect to see graded lab reports turning up in your inbox over the next week or so. The lab reports contain three grades: notebook, lab work, report. 99+% … finish reading Lab Grades

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Preparing for EsCENTial Oil lab – weeks 2 & 3

This lab experiment lasts 3 weeks. Students finished varying amounts of lab work during the first week so planning the remaining work is a little complicated. I’ve written up a two-page set of instructions to guide you. Please read this … finish reading Preparing for EsCENTial Oil lab – weeks 2 & 3

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How to interpret your IR spectrum

There seems to be a little confusion about how to interpret your experimental IR spectra and how to use Spartan’s calculated spectrum. I hope the following will help clarify things a little (I recall that I had to interpret about … finish reading How to interpret your IR spectrum

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Combination Coupling in Salicylic Acid 1H NMR

The reading of Exp’t 4 (salicylic acid) lab reports informed me that many 201 students struggled with the complexities of the proton NMR spectrum. The NMR of salicylic acid is complicated, no doubt about it, but it can be understood … finish reading Combination Coupling in Salicylic Acid 1H NMR

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Delete Peak = No-No in NMR

An NMR spectrum provides important data on what’s in the NMR sample. Students are taught to look for certain contaminants – TMS, CHCl3, H2O – as a matter of routine. As many know, however, removing the last traces of chromatography … finish reading Delete Peak = No-No in NMR

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NMR & IR slides from lab lecture

A few of you were unable to attend last night’s lab lecture. Here are slides from the lab lecture (bonus prize: GC data for a ‘standard’ mixture of isopentyl alcohol and isopentyl acetate): IR slides NMR slides GC standards

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Oct 10 lab lecture slides – distillation

You can download a copy of tonight’s lecture here.

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Office hour canceled for doctor’s appointment

The office hour scheduled for Monday, Sept 23, is canceled. I have a doctor’s appointment in NE Portland at that time. I will be on campus for lab on Monday and will answer questions that you bring there. Normal office … finish reading Office hour canceled for doctor’s appointment

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