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Inorganic Chemistry the formation of a dative bond between the isoindoline ring nitrogen and the nickel ion. This results in a relatively strain-free six-membered isoindolenine ring in which the terminal imino nitrogen comes into close proximity to the ring carbon atom of the other coordinating ligand, to which the alkoxy group is bonded. Consequently, ring closure should be effected in a facile manner. This is found to be the case. Heating Ni-(CsiHigNíCOg (I-D) results in the splitting off of the alkoxy groups and the rearrangement of bonds involving ring closure resulting in the formation of nickel phthalocyanine. The other products, identified by mass spectrometry, are 1-pentanol and 1-pentanal.Acknowledgment.-We wish to thank Mr. D. Vickers for ably assisting us in obtaining and interpreting the nuclear magnetic resonance spectra. In addition, we acknowledge the microanalytical group at Olin Mathieson for the expert handling of the samples reported herein. NotesContribution prom the Oi.in Mathieson

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