Objective: To determine the transformation between two known crystal
forms of the title compound (C18H23NO3, Mr = 301.37). Methods: To recrystallize or heat the crystals and determine
the crystal form by testing the melting points. Results: Both the two known
crystal forms of the title compound can be changed by dissolving into different
organic solvents such as acetone and ethyl acetate. Crystal form I was not influenced by heating while crystal form II can be transformed to crystal form I through melting method. Conclusion: Organic solvents have significant
influences on the two crystal forms of title compound. Crystal form I shows a better thermal stability than crystal form II.
Cite this paper
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