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Organic systems
ChemSpider Synthetic Pages

An interactive database of synthetic chemistry. [Publisher: Royal Society of Chemistry]

Organic Syntheses

Detailed, reliable, and carefully checked procedures for the synthesis of organic compounds. [Publisher: Organic Syntheses, Inc.]


A free web based application that allows browsing of a growing database of organic syntheses. [Publisher: SynArchive]

Synthesis Protocols

Solid phase, solution phase and library synthesis procedures [Publisher: Boston University, USA]

Physical data

Bordwell pKa Table

[Publisher: University of Wisconsin, USA]

Electron Density Server at Uppsala University

[Publisher: Uppsala University, Sweden]

NIST - Free Standard Reference Databases

[Publisher: National Institute of Standards and Technology (NIST), USA]

NIST - Physical Reference Data

[Publisher: National Institute of Standards and Technology (NIST), USA]