Hexameric Organotincarboxylates with Cyclic and Drum Structures

The interaction of 3,5-diisopropylsalicylic acid (DIPSA) with [ n Bu2Sn(O)] in benzene proceeds with elimination of water to produce stannoxane [ n Bu2Sn(3,5- i Pr2C6H2(O)(COO))]6 (1), while an analogous reaction of DIPSA with [ n BuSn(O)(OH)] leads to the isolation of [ n BuSn(O)(3,5- i Pr2C6H2(OH)...

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Bibliographic Details
Published in:Organometallics 2004-11, Vol.23 (23), p.5644-5647
Main Authors: Prabusankar, Ganesan, Murugavel, Ramaswamy
Format: Article
Language:English
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Summary:The interaction of 3,5-diisopropylsalicylic acid (DIPSA) with [ n Bu2Sn(O)] in benzene proceeds with elimination of water to produce stannoxane [ n Bu2Sn(3,5- i Pr2C6H2(O)(COO))]6 (1), while an analogous reaction of DIPSA with [ n BuSn(O)(OH)] leads to the isolation of [ n BuSn(O)(3,5- i Pr2C6H2(OH)(COO))]6 (2). The new products have been characterized by elemental analysis and EI-MS, IR, and NMR (1H, 13C, and 119Sn) spectroscopy. The molecular structure of 1 determined by single-crystal X-ray diffraction studies reveals a rare cyclic hexameric structure. The tin atoms are pentacoordinated with distorted trigonal-bipyramidal geometry. Complex 2 is also a hexameric cluster, but existing in a more common drum-like structure where the tin centers are hexacoordinated.
ISSN:0276-7333
1520-6041
DOI:10.1021/om049584u