Abstract
The contribution of silaalkylphosphonic acids Me3SiCH2 P(O)(OH)2 (1) and Me3SiC(CH3) P(O)(OH)2 (2) as ligands was demonstrated for the first time by the isolation of new diorganotin(IV) phosphonates Et2Sn{OP(O)(OH)CH2SiMe3}(OSO2Me) (3), (Et2 Sn)6{OPC(CH3)2SiMe3}4(OSOMe2)4 (4), and Et2Sn(O3PCH2SiMe3) (5). X-ray crystallographic studies of 1-4 are presented. The structures of 1 and 2 adopt extended motifs by virtue of P-OH···O=P-type hydrogen bonding interactions. The molecular structure of 3 is composed of a dimer formed by bridging hydrogen phosphonate groups, while the sulfonate group appended on each tin atom acts in a μ2-bridging mode to afford the formation of one-dimensional coordination polymer featuring alternate eight-membered [-Sn-O-P-O-]2 and [-Sn-O-S-O-]2 rings. The asymmetric unit of4 is composed of two crystallographically unique trinuclear tin phosphonate clusters with a Sn3(μ3-PO3)2 core linked together by coordinative association of a μ2-sulfonate group, while the remaining sulfonates are involved in the construction of a two-dimensional self-assembly. The identity of1-5 in solution was established by IR and multinuclear (1H, 13C, 31P, 119Sn) NMR spectroscopy. The presence of silaalkyl group in5 imparts unusual solubility in hydrocarbon, aromatic, and ether solvents. As a consequence, the formation of colloidal particles of5 featuring rodlike morphology was achieved by ultrasonication of a solution in ethanol-chloroform mixture.
Original language | English |
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Pages (from-to) | 6195-6203 |
Number of pages | 9 |
Journal | Inorganic Chemistry |
Volume | 53 |
Issue number | 12 |
Early online date | 22 May 2014 |
DOIs | |
Publication status | Published - 16 Jun 2014 |