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Soc."},{"key":"ref27\/cit27","doi-asserted-by":"crossref","first-page":"2563","DOI":"10.1039\/dt9930002563","author":"Fawcett J.","year":"1993","journal-title":"J Chem Soc Dalton"},{"key":"ref28\/cit28","doi-asserted-by":"crossref","first-page":"1527","DOI":"10.1039\/a703204h","author":"Downing J. H.","year":"1997","journal-title":"Chem. Commun."},{"key":"ref29\/cit29","unstructured":"The31P NMR chemical shifts are sensitive to concentration, solvent and temperature. In the equilibrium studies, changes in chemical shift of <0.5 ppm were observed and so 10% C6D6was added to provide a lock. The concentrations were kept low (0.050 M in phosphorus) in order to minimize the effects of H-bonding by the [s-PhobPH2]Cl solute. Nevertheless, significant errors in the equilibrium constants are likely although the measured values ofK1at two different concentrations were within 10% of each other. Since pKais logarithmic, the conclusion of a difference of \u223c2 units betweena-PhobPH ands-PhobPH should be robust."},{"key":"ref30\/cit30","unstructured":"Arnoldy, P., Bolinger, C. M., Drent, E., Eberhard, M. R., Heeres, H. J., Van Der Linden, A. J., Mul, P. M., Pringle, P. G., Suykerbuyk, J. C. L. J., and Tau, K. D.World Patent2002, WO 02064250, to Shell."},{"key":"ref31\/cit31","unstructured":"The assignment of the minor species asa7-PhobPH was validated by the addition of genuines-PhobPH to a sample of the mixture ofa5-PhobPH anda7-PhobPH and three distinct31P NMR signals were observed at \u221248.4, \u221254.1, and \u221254.3 ppm. Furthermore, addition of BH3\u00b7THF to the 3:1:1 mixture ofa5-PhobPH,a7-PhobPH, ands-PhobPH gave a 3:1:1 mixture ofa5-PhobPH(BH3),a7-PhobPH(BH3), ands-PhobPH(BH3)."},{"key":"ref32\/cit32","doi-asserted-by":"crossref","first-page":"3874","DOI":"10.1021\/ic951494h","volume":"35","author":"Bader A.","year":"1996","journal-title":"Inorg. 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Soc."},{"key":"ref37\/cit37","doi-asserted-by":"crossref","first-page":"650","DOI":"10.1039\/B712782K","author":"Muller A.","year":"2008","journal-title":"Dalton Trans."},{"key":"ref38\/cit38","unstructured":"To compareJPSevalues with those from ref3it is important to use the same solvent since the values obtained in MeOH (1a7, 649 Hz;1s, 671 Hz;1a5, 696 Hz) are significantly lower than in CDCl3but are in the same descending order."},{"key":"ref39\/cit39a","doi-asserted-by":"crossref","first-page":"1093","DOI":"10.1039\/b108467d","author":"Clarke M. L.","year":"2002","journal-title":"J. Chem. Soc., Dalton Trans."},{"key":"ref39\/cit39b","doi-asserted-by":"crossref","first-page":"121","DOI":"10.1016\/S0010-8545(03)00069-9","volume":"245","author":"Roodt A.","year":"2003","journal-title":"Coord. Chem. Rev."},{"key":"ref40\/cit40","doi-asserted-by":"crossref","first-page":"5805","DOI":"10.1021\/ic951553r","volume":"35","author":"Howard S. T.","year":"1996","journal-title":"Inorg. Chem."},{"key":"ref41\/cit41","unstructured":"Compare the experimental values (from ref32) and calculated values for the following: PMePhnPr, exptl \u0394G\u2021= 32.1 kcal mol\u22121(403 K), calcd \u0394G\u2021= 30.2 kcal mol\u22121(298 K); PMePhtBu, exptl \u0394G\u2021= 32.7 kcal mol\u22121(403 K), calcd \u0394G\u2021= 30.4 kcal mol\u22121(298 K); 3-methyl-1-phenylphospholane, exptl \u0394G\u2021= ca. 36 kcal mol\u22121(443 K), calcd \u0394G\u2021= 31.1 kcal mol\u22121(298 K)."},{"key":"ref42\/cit42a","doi-asserted-by":"crossref","first-page":"4217","DOI":"10.1002\/anie.200700386","volume":"46","author":"Schreiner P. R.","year":"2007","journal-title":"Angew. Chem., Int. Ed."},{"key":"ref42\/cit42b","doi-asserted-by":"crossref","first-page":"4460","DOI":"10.1002\/anie.200600448","volume":"45","author":"Grimme S.","year":"2006","journal-title":"Angew. Chem., Int. Ed."},{"key":"ref43\/cit43","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1002\/chem.200500891","volume":"12","author":"Fey N.","year":"2006","journal-title":"Chem. Eur. J."},{"key":"ref44\/cit44","unstructured":"Phosphacycles have recently attracted considerable attention in hydroformylation catalysis. For leading references see:"},{"key":"ref44\/cit44a","doi-asserted-by":"crossref","first-page":"5505","DOI":"10.1039\/b712456m","author":"M\u00fcller C.","year":"2007","journal-title":"Dalton Trans."},{"key":"ref44\/cit44b","doi-asserted-by":"crossref","first-page":"202","DOI":"10.1039\/B815056G","author":"Haddow M. F.","year":"2009","journal-title":"Dalton Trans."},{"key":"ref45\/cit45","doi-asserted-by":"crossref","first-page":"1518","DOI":"10.1021\/om9503712","volume":"15","author":"Pangborn A. B.","year":"1996","journal-title":"Organometallics"},{"key":"ref46\/cit46","doi-asserted-by":"crossref","first-page":"15","DOI":"10.1016\/S0020-1693(00)84996-8","volume":"201","author":"Fraccarollo D.","year":"1992","journal-title":"Inorg. Chim. Acta"},{"key":"ref47\/cit47","doi-asserted-by":"crossref","first-page":"411","DOI":"10.1016\/S0022-328X(00)95058-7","volume":"59","author":"Clark H. C.","year":"1973","journal-title":"J. Organomet. Chem."},{"key":"ref48\/cit48","doi-asserted-by":"crossref","first-page":"84","DOI":"10.1002\/9780470132593.ch20","volume":"28","author":"McCleverty J. A.","year":"1990","journal-title":"Inorg. Synth."},{"key":"ref49\/cit49","unstructured":"There was also ca. 3.5% of an unidentified primary phosphine impurity having \u03b4P\u2212125 (probably (5-cycloctenyl)PH2or (cycloctyl)PH2) which was present in the commercial phobane. This caused no problems with the purity of the derivatives."},{"key":"ref50\/cit50","volume-title":"SHELXTL program system version 5.1","year":"1998"},{"key":"ref51\/cit51","volume-title":"Jaguar, version 6.0","year":"2005"},{"key":"ref52\/cit52a","volume-title":"Quantum Theory of Molecules and Solids","volume":"4","author":"Slater J. C.","year":"1974"},{"key":"ref52\/cit52b","doi-asserted-by":"crossref","first-page":"3098","DOI":"10.1103\/PhysRevA.38.3098","volume":"38","author":"Becke A. D.","year":"1988","journal-title":"Phys. Rev. A"},{"key":"ref52\/cit52c","doi-asserted-by":"crossref","first-page":"5048","DOI":"10.1103\/PhysRevB.23.5048","volume":"23","author":"Perdew J. P.","year":"1981","journal-title":"Phys. Rev. B"},{"key":"ref52\/cit52d","doi-asserted-by":"crossref","first-page":"8822","DOI":"10.1103\/PhysRevB.33.8822","volume":"33","author":"Perdew J. P.","year":"1986","journal-title":"Phys. Rev. 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