Diversity of supramolecular aggregation in copper(II) pentane-2,4-dionato compounds with methyl substituted 2-aminopyridines

作者：Perdih Franc^*

来源：Journal of Coordination Chemistry, 2012, 65(9): 1580-1591.

DOI：10.1080/00958972.2012.676168

• Acetylacetonate
• Copper
• Crystal structure
• Hydrogen bonds
• pi-pi Interaction

Three copper(II) bis(pentane-2,4-dionato-kappa O-2,O%26apos;) compounds with 2-amino-3-methylpyridine (2,3-ampy) (1), 2-amino-5-methylpyridine (2,5-ampy) (2), and 2-amino-4-methylpyridine (2,4-ampy) (3) were prepared by reaction of bis(pentane-2,4-dionato-kappa O-2,O%26apos;)copper(II) with selected methyl substituted 2-aminopyridines. The coordination of Cu(II) in all three compounds is square pyramidal and intramolecular N-H center dot center dot center dot O hydrogen-bonding is present. X-ray crystallographic studies reveal different crystal aggregation influenced by a methyl substituent on pyridine. No intermolecular N-H center dot center dot center dot O hydrogen-bonding is present in 1. Intermolecular N-H center dot center dot center dot O hydrogen-bonding in 2 forms infinite chains and dimers are formed in 3. Extended 3-D aggregation was found in 2 via pi-pi and C-H center dot center dot center dot pi (arene) interactions, while only chain formation was found in 1 and 3.

• 出版日期2012