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Engl."},{"key":"ref8\/cit8c","doi-asserted-by":"crossref","first-page":"5818","DOI":"10.1002\/anie.200601162","volume":"45","author":"Benner K.","year":"2006","journal-title":"Angew. Chem., Int. Ed."},{"key":"ref8\/cit8d","doi-asserted-by":"crossref","first-page":"601","DOI":"10.1002\/chem.19970030416","volume":"3","author":"Kl\u00fcfers P.","year":"1997","journal-title":"Chem.\u2014Eur. J."},{"key":"ref8\/cit8e","doi-asserted-by":"crossref","first-page":"924","DOI":"10.1002\/anie.200460079","volume":"44","author":"Gei\u00dfelmann A.","year":"2005","journal-title":"Angew. Chem., Int. Ed."},{"key":"ref9\/cit9a","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1016\/S0022-328X(00)00286-2","volume":"605","author":"Fornasier R.","year":"2000","journal-title":"J. Organomet. Chem."},{"key":"ref9\/cit9b","doi-asserted-by":"crossref","first-page":"767","DOI":"10.1021\/cr050576c","volume":"106","author":"Hapiot F.","year":"2006","journal-title":"Chem. Rev."},{"key":"ref10\/cit10a","doi-asserted-by":"crossref","first-page":"1026","DOI":"10.1002\/anie.198510261","volume":"24","author":"Babenau A.","year":"1985","journal-title":"Angew. Chem., Int. Ed. Engl."},{"key":"ref10\/cit10b","doi-asserted-by":"crossref","first-page":"3836","DOI":"10.1021\/ja017782w","volume":"124","author":"Wu C. D.","year":"2002","journal-title":"J. Am. Chem. Soc."},{"key":"ref11\/cit11","doi-asserted-by":"crossref","first-page":"2409","DOI":"10.1002\/anie.200353359","volume":"43","author":"Zheng G.-L.","year":"2004","journal-title":"Angew. Chem., Int. Ed."},{"key":"ref12\/cit12","unstructured":"Synthesis of compound1: A mixture of BuSnO(OH) (0.11 g, 0.50 mmol), \u03b2-cyclodextrin (0.56 g, 0.50 mmol), and NEt3(0.1 mL) in 15 mL of ethanol was heated in a Teflon-lined autoclave at 160 \u00b0C for 4 days. Upon cooling to room temperature, colorless crystals of compound1were collected. Yield: 38% yield (based on Sn). Synthesis of compound2: Compound2was prepared by a method similar to that of compound1by using SnCl4\u00b75H2O (0.18 g, 0.50 mmol) instead of BuSnO(OH). Colorless crystals of compound2were collected with 35% yield (based on Sn)."},{"key":"ref13\/cit13a","unstructured":"aSingle-crystal X-ray data of compounds1and2were collected on a Bruker Smart Apex CCD diffractometer at 293 K, with graphite-monochromated Mo K\u03b1 radiation (\u03bb = 0.710\u200973\u00c5). The structure was solved with the direct method ofSHELXS-97(13c)and refined with full-matrix least-squares techniques using theSHELXL-97(13d)program within WINGX.(13e)Non-H atoms were refined anisotropically. Selected bond lengths and bond angles are given inTable S1 in the Supporting Information."},{"key":"ref13\/cit13b","unstructured":"bCrystal data for1: hexagonal, space groupP63,Mr= 3652.27,a= 20.300(19) \u00c5,b= 20.300 \u00c5,c= 27.112(3) \u00c5, \u03b1 = 90\u00b0, \u03b2 = 90\u00b0, \u03b3 = 120\u00b0,V= 9675.7(13) \u00c53,Z= 2, \u03bc = 0.356 mm\u22121,Dc= 1.254 Mg m\u22123,F(000) = 3816,T= 293(2) K, 61\u2009355 reflections collected, 15\u2009253 unique withRint= 0.0476, R1 = 0.0524, wR2 = 0.1340 [I> 2\u03c3(I)], GOF = 1.005. Crystal data for2: trigonal, space groupR3,Mr= 3634.26,a= 19.9000(11) \u00c5,b= 19.9000(11) \u00c5,c= 43.051(1) \u00c5, \u03b1 = 90\u00b0, \u03b2 = 90\u00b0, \u03b3 = 120\u00b0,V= 14764.5(12) \u00c53,Z= 3, \u03bc = 0.350 mm\u22121,Dc= 1.226 Mg m\u22123,F(000) = 5694,T= 293(2) K, 26\u2009539 reflections collected, 12\u2009748 unique withRint= 0.0352, R1 = 0.0595, wR2 = 0.1472 [I> 2\u03c3(I)], GOF = 1.016. The data were corrected for absorption by the multiscan."},{"key":"ref13\/cit13c","unstructured":"cSheldrick, G. M.SHELXS-97, A Program for Automatic Solution of Crystal Structure;University of G\u00f6ttingen:G\u00f6ttingen, Germany, 1997."},{"key":"ref13\/cit13d","unstructured":"dSheldrick, G. M.SHELXL-97, A Programs for Crystal Structure Refinement;University of G\u00f6ttingen:G\u00f6ttingen, Germany, 1997."},{"key":"ref13\/cit13e","unstructured":"eFarrugia, L. J.WINGX, A Windows Program for Crystal Structure Analysis;University of Glasgow:Glasgow, U.K., 1988."},{"key":"ref14\/cit14","unstructured":"The channel dimensions are estimated from the van der Waals radii for carbon (1.70 \u00c5), nitrogen (1.55 \u00c5), and oxygen (1.52 \u00c5) in the analysis."},{"key":"ref15\/cit15","unstructured":"Computational methods: All calculations were performed with theGaussian03program package.(16)Density functional theory calculations were carried out with the three-parameter gradient-corrected exchange potential of Becke and the gradient-corrected correlation potential of Lee, Yang, and Parr (B3LYP)(17)with the LANL2DZ basis set. The atomic charges in the complex were calculated by NPA in NBO program.(18)"},{"key":"ref16\/cit16","unstructured":"Frisch, M. J., Trucks, G. W., Schlegel, H. B., Scuseria, G. E., Robb, M. A., Cheeseman, J. R., Zakrzewski, V. G., Montgomery, J. A., Stratmann, R. E., Burant, J. C., Dapprich, S., Millam, J. M., Daniels, A. D., Kudin, K. N., Strain, M. C., Farkas, O., Tomasi, J., Barone, V., Cossi, M., Cammi, R., Mennucci, B., Pomelli, C., Adamo, C., Clifford, S., Ochterski, J., Petersson, G. A., Ayala, P. Y., Cui, Q., Morokuma, K., Malick, D. K., Rabuck, A. D., Raghavachari, K., Foresman, J. B., Cioslowski, J., Ortiz, J. V., Stefanov, B. B., Liu, G., Liashenko, A., Piskorz, P., Komaromi, I., Gomperts, R., Martin, R. L., Fox, D. J., Keith, T., Al-Laham, M. A., Peng, C. Y., Nanayakkara, A., Gonzalez, C., Challacombe, M., Gill, P. M. W., Johnson, B. G., Chen, W., Wong, M. W., Andres, J. L., Head-Gordon, M., Replogle, E. S., and Pople, J. A.Gaussian98, revisionA.7;Gaussian Inc.:Pittsburgh, PA, 1998."},{"key":"ref17\/cit17a","doi-asserted-by":"crossref","first-page":"5648","DOI":"10.1063\/1.464913","volume":"98","author":"Becke A. D.","year":"1993","journal-title":"J. Chem. Phys."},{"key":"ref17\/cit17b","doi-asserted-by":"crossref","first-page":"785","DOI":"10.1103\/PhysRevB.37.785","volume":"37","author":"Lee C.","year":"1988","journal-title":"Phys. Rev. B"},{"key":"ref18\/cit18a","doi-asserted-by":"crossref","first-page":"7211","DOI":"10.1021\/ja00544a007","volume":"102","author":"Foster J. P.","year":"1980","journal-title":"J. Am. Chem. Soc."},{"key":"ref18\/cit18b","unstructured":"bGlendening, E. D., Reed, A. E., Carpenter, J. E., and Weinhold, F.NBO, version3.1;University of Wisconsin:Madison, WI, 1990."},{"key":"ref19\/cit19","doi-asserted-by":"crossref","first-page":"1745","DOI":"10.1016\/j.ccr.2005.03.028","volume":"249","author":"Chandrasekhar V.","year":"2005","journal-title":"Coord. Chem. 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