A New System in Organooxotin Cluster Chemistry Incorporating Inorganic and Organic Spacers between Two Ladders Each Containing Five Tin Atoms
✍ Scribed by Guo-Li Zheng; Jian-Fang Ma; Jin Yang; Yin-Yan Li; Xiang-Rong Hao
- Book ID
- 101834701
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 402 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0947-6539
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Hydrolysis of dibenzyltin dichloride in ethanol has been found to give an unprecedented carbonate anion (CO~3~^2−^)‐bridged double‐ladder organooxotin cluster, [(R~2~SnO)~3~(R~2~SnOH)~2~(CO~3~)]~2~ (1, R = C~6~H~5~CH~2~), with five tin atoms in each ladder. With the aim of obtaining organooxotin clusters with large cavities suitable for host–guest chemistry, we used 1,1′‐ferrocenedicarboxylic acid (H~2~L~a~) and hexanedioic acid (H~2~L~b~) to replace the carbonate anions (CO~3~^2−^), and thereby clusters [(R~2~SnO)~3~(R~2~SnOH)~2~L~a~]~2~ (2) and [(R~2~SnO)~3~(R~2~SnOH)~2~L~b~]~2~ (3) were obtained. When 1 was treated with benzoic acid (HL~c~) in different stoichiometric ratios (1:4, 1:10), ladder cluster (R~2~SnO)~3~(R~2~SnOH)~2~(L~c~)~2~ (4) and drum cluster [RSn(O)L~c~]~6~ (5) were obtained. Through the hydrolysis of Cy~2~SnCl~2~ (Cy = C~6~H~11~) and (C~6~H~5~CH~2~)~2~SnCl~2~, two interesting ethanolate‐modified clusters [Cy~2~(C~2~H~5~O)SnOSn(C~2~H~5~O)Cy~2~]~2~ (6) and [(R~2~SnO)~3~(R~2~SnOH)(R~2~SnOC~2~H~5~)(CO~3~)]~2~ (7) were obtained. All the tin atoms in these ladder clusters are five‐coordinate surrounded by two alkyl groups and three O atoms, and have distorted trigonal‐bipyramidal coordination environments with two carbon atoms and one O atom in the equatorial positions and two O atoms in the axial positions. The structures of all these compounds have been established by single‐crystal X‐ray diffraction analyses.