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9
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38749121547
-
-
3-hybridized centers thanks to better orbital overlap in the transition state, see Collman, J. P.; Hegedus, L. S.; Norton, J. R.; Finke, R. G. Principles and Applications of Organotransition Metal Chemistry, 2nd ed.; University Science Books: Mill Valley, CA, 1987; Section 5.6.
-
3-hybridized centers thanks to better orbital overlap in the transition state, see Collman, J. P.; Hegedus, L. S.; Norton, J. R.; Finke, R. G. Principles and Applications of Organotransition Metal Chemistry, 2nd ed.; University Science Books: Mill Valley, CA, 1987; Section 5.6.
-
-
-
-
10
-
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2642616482
-
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2 have been attributed to inherent differences in the Zr-C bond strength. See Borkowsky, S. L.; Jordan, R. F.; Hinch, G. D. Organometallics 1991, 10, 1268-1274.
-
2 have been attributed to inherent differences in the Zr-C bond strength. See Borkowsky, S. L.; Jordan, R. F.; Hinch, G. D. Organometallics 1991, 10, 1268-1274.
-
-
-
-
11
-
-
38749086297
-
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SMART, Version 5.1; Bruker Analytical X-Ray Systems, Inc, Madison, WI, 1999
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SMART, Version 5.1; Bruker Analytical X-Ray Systems, Inc.: Madison, WI, 1999.
-
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12
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-
38749091535
-
-
SAINT, Version 5.1; Bruker Analytical X-Ray Systems, Inc, Madison, WI, 1999
-
SAINT, Version 5.1; Bruker Analytical X-Ray Systems, Inc.: Madison, WI, 1999.
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13
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38749129335
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Sheldrick, G. M. SADABS, Version 2.05; Bruker Analytical X-Ray Systems, Inc, Madison, WI, 2001
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Sheldrick, G. M. SADABS, Version 2.05; Bruker Analytical X-Ray Systems, Inc.: Madison, WI, 2001.
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14
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38749106408
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Sheldrick, G. M. SHELXTL, Version 6.12; Bruker Analytical X-Ray Systems, Inc, Madison, WI, 2001
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Sheldrick, G. M. SHELXTL, Version 6.12; Bruker Analytical X-Ray Systems, Inc.: Madison, WI, 2001.
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15
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0003872738
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Kluwer Academic Publishers: Dordrecht, The Netherlands
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International Tables for X-Ray Crystallography; Kluwer Academic Publishers: Dordrecht, The Netherlands, 1992; Vol. C.
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-
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18
-
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38749136844
-
-
6, can be found in the Supporting Information.
-
6, can be found in the Supporting Information.
-
-
-
-
19
-
-
38749109062
-
-
2] can be isolated. A preliminary crystal structure confirms the connectivity and geometry proposed in eq I.
-
2] can be isolated. A preliminary crystal structure confirms the connectivity and geometry proposed in eq I.
-
-
-
-
21
-
-
38749105284
-
-
1H NMR spectroscopy was used to monitor the number of total number of Zr-Ph and Zr-p-tolyl groups. We had to assume that the rate of exchange of a PhLi for a p-tolylLi was independent of whether the neighboring group was PhLi or p-tolylLi. Since very similar rate constants were obtained for the forward and reverse reactions, this is a valid assumption.
-
1H NMR spectroscopy was used to monitor the number of total number of Zr-Ph and Zr-p-tolyl groups. We had to assume that the rate of exchange of a PhLi for a p-tolylLi was independent of whether the neighboring group was PhLi or p-tolylLi. Since very similar rate constants were obtained for the forward and reverse reactions, this is a valid assumption.
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38749102566
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8 are broadened into the baseline, even at -35°C
-
8 are broadened into the baseline, even at -35°C
-
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41
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38749093558
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While symmetry allows for the ap2- ligand to be considered a 4π or even a 6π, electron donor, such electron counting would require the assignment of very unrealistic formal charges to the amidophenolate ligand
-
2- ligand to be considered a 4π (or even a 6π!) electron donor, such electron counting would require the assignment of very unrealistic formal charges to the amidophenolate ligand.
-
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-
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42
-
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38749084736
-
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While the interpretation of activation entropies can be dubious, in this case, the similarity of the LiX exchange reaction and experimental conditions and the magnitude of the difference in ΔS‡ values allow for the use of these measured values to answer (or rather raise) mechanistic questions. See ref 34
-
While the interpretation of activation entropies can be dubious, in this case, the similarity of the LiX exchange reaction and experimental conditions and the magnitude of the difference in ΔS‡ values allow for the use of these measured values to answer (or rather raise) mechanistic questions. See ref 34.
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