-
5
-
-
0000462370
-
-
Cozzi F., Cinguini M., Annunziata R., Dwyer T., Siegel J.S. J. Am. Chem. Soc. 114:1992;5729
-
(1992)
J. Am. Chem. Soc.
, vol.114
, pp. 5729
-
-
Cozzi, F.1
Cinguini, M.2
Annunziata, R.3
Dwyer, T.4
Siegel, J.S.5
-
8
-
-
0038305195
-
-
Suzuki T., Nagasu T., Kawai H., Fujiwara K., Tsuji T. Tetrahedron Lett. 44:2003;6095
-
(2003)
Tetrahedron Lett.
, vol.44
, pp. 6095
-
-
Suzuki, T.1
Nagasu, T.2
Kawai, H.3
Fujiwara, K.4
Tsuji, T.5
-
22
-
-
2442466438
-
-
Kawai, H.; Takeda, T.; Fujiwara, K.; Suzuki, T. Hokkaido Winter Symposium, Abstract Paper (2B20), 2004, 87
-
(2004)
Hokkaido Winter Symposium, Abstract Paper (2B20)
, pp. 87
-
-
Kawai, H.1
Takeda, T.2
Fujiwara, K.3
Suzuki, T.4
-
23
-
-
2442587181
-
-
note
-
2)
-
-
-
-
24
-
-
2442572671
-
-
note
-
Hexaphenylethanes are notorious for giving the disordered crystal structures around the inner C-C bond due to the 'globular' molecular shape (Ref. 14). Since the carbocations 2 possess the similar structural features, there will be high possibility that the C-H ⋯ C part in 2 with four aryl groups of a kind suffers from positional disorder in crystal, thus preventing the chance to tell the localized structure from the delocalized one by X-ray analysis
-
-
-
-
27
-
-
2442423762
-
-
note
-
abstract
-
-
-
-
28
-
-
2442425883
-
-
note
-
+)
-
-
-
-
30
-
-
2442438446
-
-
note
-
4Li are also due to the similar by-production of such abnormal adducts
-
-
-
-
31
-
-
2442551412
-
-
note
-
-1, T=153 K. The final R value is 0.069 for 8195 independent reflections with I>3σI and 757 parameters
-
-
-
-
32
-
-
2442614591
-
-
note
-
C 177 and 176 ppm, respectively) are close to that of 8 (175 ppm), which is also in consonant with this structural assignment
-
-
-
-
33
-
-
0003438540
-
The Nature of Chemical Bond
-
Ithaca, NY: Cornell University Press. p 260
-
Pauling L. The Nature of Chemical Bond. 3rd ed. 1960;Cornell University Press, Ithaca, NY. p 260
-
(1960)
3rd Ed.
-
-
Pauling, L.1
-
35
-
-
0004133516
-
-
Gaussian, Pittsburg, PA
-
GAUSSIAN98. 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.; Chen, W.; Wong, M. W.; Andres, J. L.; Gonzalez, C.; Head-Gordon, M.; Replogle, E. S.; Pople, J. A. Gaussian, Pittsburg, PA, 1998
-
(1998)
GAUSSIAN98
-
-
Frisch, M.J.1
Trucks, G.W.2
Schlegel, H.B.3
Scuseria, G.E.4
Robb, M.A.5
Cheeseman, J.R.6
Zakrzewski, V.G.7
Montgomery, J.A.8
Stratmann, R.E.9
Burant, J.C.10
Dapprich, S.11
Millam, J.M.12
Daniels, A.D.13
Kudin, K.N.14
Strain, M.C.15
Farkas, O.16
Tomasi, J.17
Barone, V.18
Cossi, M.19
Cammi, R.20
Mennucci, B.21
Pomelli, C.22
Adamo, C.23
Clifford, S.24
Ochterski, J.25
Petersson, G.A.26
Ayala, P.Y.27
Cui, Q.28
Morokuma, K.29
Malick, D.K.30
Rabuck, A.D.31
Raghavachari, K.32
Foresman, J.B.33
Cioslowski, J.34
Ortiz, J.V.35
Stefanov, B.B.36
Liu, G.37
Liashenko, A.38
Piskorz, P.39
Komaromi, I.40
Gomperts, R.41
Martin, R.L.42
Fox, D.J.43
Keith, T.44
Al-Laham, M.A.45
Peng, C.Y.46
Nanayakkara, A.47
Gonzalez, C.48
Challacombe, M.49
Gill, P.M.W.50
Johnson, B.51
Chen, W.52
Wong, M.W.53
Andres, J.L.54
Gonzalez, C.55
Head-Gordon, M.56
Replogle, E.S.57
Pople, J.A.58
more..
-
38
-
-
2442501092
-
-
note
-
′ under acidic conditions observed here also conflicts with their view that 2b/3b might be unstable against acid with forming dication 5b. We are not sure that such drastic changes in reactivity come from the different substituents on the aryl groups
-
-
-
-
39
-
-
0001432693
-
-
+ contact, that prefers the C-H localized structure rather than the delocalized one with a three-centered-four-electron bond
-
+ contact, that prefers the C-H localized structure rather than the delocalized one with a three-centered-four-electron bond Arduengo A.J. III, Gamper S.F., Tamm M., Calabrese J.C., Davidson F., Craig H.A. J. Am. Chem. Soc. 117:1995;572
-
(1995)
J. Am. Chem. Soc.
, vol.117
, pp. 572
-
-
Arduengo III, A.J.1
Gamper, S.F.2
Tamm, M.3
Calabrese, J.C.4
Davidson, F.5
Craig, H.A.6
|