ChemPen and ChemPen+©
Chemical Structure Drawing
for Windows 95,98,NT®
Haworth Phenanthrene Synthesis

INTRODUCTION

ChemPen is the easy to use and inexpensive tool for chemists, educators and students who need to create create drawings for chemical documentation. ChemPen+ includes everything in ChemPen plus basic C-13 chemical shift prediction.Drawing with ChemPen is done with menus, mouse clicks and simple editors. Drawings can be pasted into Windows® graphics applications. ChemPen calculates molecular weight, molecular formula and elemental composition.

Watch the animation below or click the drawing to see how easy it was created with ChemPen.

A Drawing Example Animation Oxidizing androstanol

ChemPen+ adds C-13 NMR Shift prediction to ChemPen. If you use C-13 NMR to analyze organic molecules you will appreciate ChemPen+. ChemPen+ uses NMRPenLite©, the same powerful shift prediction module as NMRPen©. NMRPenLite differs from the more powerful NMRPen as follows:

  • 1. ChemPen+'s database has about 1100 entries compared to NMRPen's more than 73000.
    2. The user cannot add or remove shifts from the ChemPen+ database.
    3. ChemPen+ handles molecules containing N, O, F, Cl, Br, I, S, P, Si.
    4. ChemPen+ does not handle organometallic compounds.
    5. NMRPen is based on ChemPen3D

    • Despite these small limitations, ChemPen+ is still powerful. ChemPen+ can estimate the chemical shifts of literally millions of organic compounds. A few examples follow.

    Ex.1 Building Block Molecules
    		 Ex.2 Polychorinated Benzenes
    Ex.3 Branched hydrocarbons
    		 Ex.4 Chlorinated hydrocarbons
    Ex.5 Equilibrating tautomers
    		 Ex.6 Acid-Base Equilibration
    Ex.7 A Xanthene Molecule
    		 References

    SYSTEM REQUIREMENTS
    ChemPen is small but powerful. The minimum recommended system is a 486SX, Windows 95, 8MB RAM, 4MB Free HDD.

    Order ChemPen, ChemPen+, ChemPen3D or NMRPen
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    ChemPen is $39+S&H

    ChemPen+ is $59+S&H

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