Factoring Isotope Patterns A + 2 Elements (O, S and Si)

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# Factoring Isotope Patterns A + 2 Elements (O, S and Si) - PowerPoint PPT Presentation

Factoring Isotope Patterns A + 2 Elements (O, S and Si). Ray A. Gross, Jr. Prince George’s Community College. Outline. Derive a chlorine-rule equation for Br m Cl n compounds Expand the equation to include oxygen, sulfur and silicon

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## Factoring Isotope Patterns A + 2 Elements (O, S and Si)

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Presentation Transcript

### Factoring Isotope Patterns A + 2 Elements (O, S and Si)

Ray A. Gross, Jr.

Prince George’s Community College

Outline
• Derive a chlorine-rule equation for BrmClncompounds
• Expand the equation to include oxygen, sulfur and silicon
• Apply the factoring technique to isotope patterns of Br1S1, Cl1S1 and Br1Cl1S1 compounds
General A + 2 Equation

IM = 3n22q30r

T = m + n + q + r + 1

Model for Br1Si1
• IM = 3n22p30r = 30
• T = m + r + 1 = 3
Summary

Gross structures of some aromatic compounds that contain C, H, Br, Cl, O and S can be determined by factoring their A + 2 mass spectral clusters.

Acknowledgements
• Junhua Yan’s Isotope Pattern Calculator http://www.geocities.com/junhuayan/pattern.htm (accessed May 2003).
• Institute of Advanced Industrial Science and Technology; Tsukuba, Ibaraki, Japan

SDBSWeb: http://www.aist.go.jp/RIODB/SDBS/ (accessed May 2003).

• NIST Data Base, http://physics.nist.gov/PHYsRefData/Compositions/index.html
• (accessed Jul 2003).
• NSF Grant: DUE-0202431
• Chlorine Rule, in press JCE