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4
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0005846443
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Schmidt, M. W.; Angus, R. O., Jr.; Johnson, R. P. J Am. Chem. Soc. 1982, 104, 6838.
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5
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(a) Wentrup, C.; Gross, G.; Maquestiau, A.; Flammang, R. Angew. Chem. 1983, 95, 551; Angew. Chem., Int. Ed. Engl. 1983, 22, 542.
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Wentrup, C.1
Gross, G.2
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Flammang, R.4
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(a) Wentrup, C.; Gross, G.; Maquestiau, A.; Flammang, R. Angew. Chem. 1983, 95, 551; Angew. Chem., Int. Ed. Engl. 1983, 22, 542.
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9
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(a) Tolbert, L. M.; Islam, Md. N.; Johnson, R. P.; Loiselle, P. M.; Shakespeare, W. C. J. Am. Chem. Soc. 1990, 112, 6416.
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10
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0344935476
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(b) Tolbert, L. M.; Siddiqui, S. J. Am. Chem. Soc. 1984, 106, 5538. In this case, the distinction between a planar isoindenylidene and a nonplanar 4,5-benzo-1,2,4-cyclopentatriene was not resolved. However, recent computational evidence by Johnson supports the nonplanar structure: Johnson, R. P. Private communication.
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Private communication
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(b) Tolbert, L. M.; Siddiqui, S. J. Am. Chem. Soc. 1984, 106, 5538. In this case, the distinction between a planar isoindenylidene and a nonplanar 4,5- benzo-1,2,4-cyclopentatriene was not resolved. However, recent computational evidence by Johnson supports the nonplanar structure: Johnson, R. P. Private communication.
-
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Johnson, R.P.1
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14
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0001373143
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(a) Borden, W. T.; Loncharich, R. J.; Houk, K. N. Annu. Rev. Phys. Chem. 1988, 39, 213.
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(b) Houk, K. N.; Lin, Y.-T.; Brown, F. K. J. Am. Chem. Soc. 1986, 108, 554.
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54249145249
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(a) The use of allene and fluoroallenes as dienophiles in Diels-Alder reactions has been studied by semiempirical methods: Manohan, M.; Venuvanalingam, P. J. Chem. Soc., Perkin Trans. 2 1996, 1423. (b) The [2 + 2] and [2 + 4] reactivity of heterocumulenes and ketenes was studied: Fabian, W. M. F.; Janoschek, R. J. Am. Chem. Soc. 1997, 119, 4253. (c) Salzner, U.; Bachrach, S. M. J. Org. Chem. 1996, 61, 237. (e) The reactivity of strained allenes in [2 + 2] cycloadditions was also studied: Burrell, R, C.; Daoust, K. J.; Bradley, A. Z.; DiRico, K. J.; Johnson, R. P. J. Am. Chem. Soc. 1996, 118, 4218.
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Manohan, M.1
Venuvanalingam, P.2
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0030907859
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(a) The use of allene and fluoroallenes as dienophiles in Diels- Alder reactions has been studied by semiempirical methods: Manohan, M.; Venuvanalingam, P. J. Chem. Soc., Perkin Trans. 2 1996, 1423. (b) The [2 + 2] and [2 + 4] reactivity of heterocumulenes and ketenes was studied: Fabian, W. M. F.; Janoschek, R. J. Am. Chem. Soc. 1997, 119, 4253. (c) Salzner, U.; Bachrach, S. M. J. Org. Chem. 1996, 61, 237. (e) The reactivity of strained allenes in [2 + 2] cycloadditions was also studied: Burrell, R, C.; Daoust, K. J.; Bradley, A. Z.; DiRico, K. J.; Johnson, R. P. J. Am. Chem. Soc. 1996, 118, 4218.
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Fabian, W.M.F.1
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0002237502
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(a) The use of allene and fluoroallenes as dienophiles in Diels- Alder reactions has been studied by semiempirical methods: Manohan, M.; Venuvanalingam, P. J. Chem. Soc., Perkin Trans. 2 1996, 1423. (b) The [2 + 2] and [2 + 4] reactivity of heterocumulenes and ketenes was studied: Fabian, W. M. F.; Janoschek, R. J. Am. Chem. Soc. 1997, 119, 4253. (c) Salzner, U.; Bachrach, S. M. J. Org. Chem. 1996, 61, 237. (e) The reactivity of strained allenes in [2 + 2] cycloadditions was also studied: Burrell, R, C.; Daoust, K. J.; Bradley, A. Z.; DiRico, K. J.; Johnson, R. P. J. Am. Chem. Soc. 1996, 118, 4218.
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Bachrach, S.M.2
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(a) The use of allene and fluoroallenes as dienophiles in Diels- Alder reactions has been studied by semiempirical methods: Manohan, M.; Venuvanalingam, P. J. Chem. Soc., Perkin Trans. 2 1996, 1423. (b) The [2 + 2] and [2 + 4] reactivity of heterocumulenes and ketenes was studied: Fabian, W. M. F.; Janoschek, R. J. Am. Chem. Soc. 1997, 119, 4253. (c) Salzner, U.; Bachrach, S. M. J. Org. Chem. 1996, 61, 237. (e) The reactivity of strained allenes in [2 + 2] cycloadditions was also studied: Burrell, R, C.; Daoust, K. J.; Bradley, A. Z.; DiRico, K. J.; Johnson, R. P. J. Am. Chem. Soc. 1996, 118, 4218.
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Burrell, R.C.1
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(a) E.g., the vinylcyclopropane rearrangement: Houk, K. N.; Nendel, M.; Wiest, O.; Storer, J. W. J. Am. Chem. Soc. 1997, 119, 10545. (b) As well as the Cope and Claisen rearrangements: Wiest, O.; Black, K. A.; Houk, K. N. J. Am. Chem. Soc. 1994, 116, 10336.
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23
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0001461906
-
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(a) E.g., the vinylcyclopropane rearrangement: Houk, K. N.; Nendel, M.; Wiest, O.; Storer, J. W. J. Am. Chem. Soc. 1997, 119, 10545. (b) As well as the Cope and Claisen rearrangements: Wiest, O.; Black, K. A.; Houk, K. N. J. Am. Chem. Soc. 1994, 116, 10336.
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25
-
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0344504686
-
-
note
-
Endo and exo refer to the position of the diene relative to the former cyclohexadiene, rather than to the position of the substituent on the ring.
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28
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0001339328
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Otera, J.; Ioka, S.; Nozaki, H. J. Org. Chem. 1989, 54, 4013.
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0001265923
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E.g., the reaction of cyclopentadiene with (-)-menthyl acrylate: (a) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 6359. (b) Sauer, J.; Kredel, J. Angew. Chem. 1965, 77, 1037; Angew. Chem., Int. Ed. Engl. 1965, 4, 989. (c) Farmer, R. F.; Hamer, J. J. Org. Chem. 1966, 31, 2418. (d) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 731. Or the reaction of butadiene with di-(-)-menthyl fumerate: (e) Korolev, A.; Mur, V. Dokl. Akad. Nauk USSR 1948, 59, 251. (f) Korolev, A.; Mur, V. Chem. Abstr. 1948, 42, 6776. (g) Walborsky, H. M.; Barash, L.; Davis, T. C. Tetrahedron 1963, 19, 2333. (h) Walborsky, H. M.; Barash, L.; Davis, T. C. J. Org. Chem. 1961, 26, 4778.
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(1966)
Tetrahedron Lett.
, pp. 6359
-
-
Sauer, J.1
Kredel, J.2
-
30
-
-
0345265187
-
-
E.g., the reaction of cyclopentadiene with (-)-menthyl acrylate: (a) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 6359. (b) Sauer, J.; Kredel, J. Angew. Chem. 1965, 77, 1037; Angew. Chem., Int. Ed. Engl. 1965, 4, 989. (c) Farmer, R. F.; Hamer, J. J. Org. Chem. 1966, 31, 2418. (d) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 731. Or the reaction of butadiene with di-(-)-menthyl fumerate: (e) Korolev, A.; Mur, V. Dokl. Akad. Nauk USSR 1948, 59, 251. (f) Korolev, A.; Mur, V. Chem. Abstr. 1948, 42, 6776. (g) Walborsky, H. M.; Barash, L.; Davis, T. C. Tetrahedron 1963, 19, 2333. (h) Walborsky, H. M.; Barash, L.; Davis, T. C. J. Org. Chem. 1961, 26, 4778.
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Kredel, J.2
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E.g., the reaction of cyclopentadiene with (-)-menthyl acrylate: (a) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 6359. (b) Sauer, J.; Kredel, J. Angew. Chem. 1965, 77, 1037; Angew. Chem., Int. Ed. Engl. 1965, 4, 989. (c) Farmer, R. F.; Hamer, J. J. Org. Chem. 1966, 31, 2418. (d) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 731. Or the reaction of butadiene with di-(-)-menthyl fumerate: (e) Korolev, A.; Mur, V. Dokl. Akad. Nauk USSR 1948, 59, 251. (f) Korolev, A.; Mur, V. Chem. Abstr. 1948, 42, 6776. (g) Walborsky, H. M.; Barash, L.; Davis, T. C. Tetrahedron 1963, 19, 2333. (h) Walborsky, H. M.; Barash, L.; Davis, T. C. J. Org. Chem. 1961, 26, 4778.
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, vol.4
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0010226406
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E.g., the reaction of cyclopentadiene with (-)-menthyl acrylate: (a) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 6359. (b) Sauer, J.; Kredel, J. Angew. Chem. 1965, 77, 1037; Angew. Chem., Int. Ed. Engl. 1965, 4, 989. (c) Farmer, R. F.; Hamer, J. J. Org. Chem. 1966, 31, 2418. (d) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 731. Or the reaction of butadiene with di-(-)-menthyl fumerate: (e) Korolev, A.; Mur, V. Dokl. Akad. Nauk USSR 1948, 59, 251. (f) Korolev, A.; Mur, V. Chem. Abstr. 1948, 42, 6776. (g) Walborsky, H. M.; Barash, L.; Davis, T. C. Tetrahedron 1963, 19, 2333. (h) Walborsky, H. M.; Barash, L.; Davis, T. C. J. Org. Chem. 1961, 26, 4778.
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E.g., the reaction of cyclopentadiene with (-)-menthyl acrylate: (a) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 6359. (b) Sauer, J.; Kredel, J. Angew. Chem. 1965, 77, 1037; Angew. Chem., Int. Ed. Engl. 1965, 4, 989. (c) Farmer, R. F.; Hamer, J. J. Org. Chem. 1966, 31, 2418. (d) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 731. Or the reaction of butadiene with di-(-)-menthyl fumerate: (e) Korolev, A.; Mur, V. Dokl. Akad. Nauk USSR 1948, 59, 251. (f) Korolev, A.; Mur, V. Chem. Abstr. 1948, 42, 6776. (g) Walborsky, H. M.; Barash, L.; Davis, T. C. Tetrahedron 1963, 19, 2333. (h) Walborsky, H. M.; Barash, L.; Davis, T. C. J. Org. Chem. 1961, 26, 4778.
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E.g., the reaction of cyclopentadiene with (-)-menthyl acrylate: (a) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 6359. (b) Sauer, J.; Kredel, J. Angew. Chem. 1965, 77, 1037; Angew. Chem., Int. Ed. Engl. 1965, 4, 989. (c) Farmer, R. F.; Hamer, J. J. Org. Chem. 1966, 31, 2418. (d) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 731. Or the reaction of butadiene with di-(-)-menthyl fumerate: (e) Korolev, A.; Mur, V. Dokl. Akad. Nauk USSR 1948, 59, 251. (f) Korolev, A.; Mur, V. Chem. Abstr. 1948, 42, 6776. (g) Walborsky, H. M.; Barash, L.; Davis, T. C. Tetrahedron 1963, 19, 2333. (h) Walborsky, H. M.; Barash, L.; Davis, T. C. J. Org. Chem. 1961, 26, 4778.
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E.g., the reaction of cyclopentadiene with (-)-menthyl acrylate: (a) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 6359. (b) Sauer, J.; Kredel, J. Angew. Chem. 1965, 77, 1037; Angew. Chem., Int. Ed. Engl. 1965, 4, 989. (c) Farmer, R. F.; Hamer, J. J. Org. Chem. 1966, 31, 2418. (d) Sauer, J.; Kredel, J. Tetrahedron Lett. 1966, 731. Or the reaction of butadiene with di-(-)-menthyl fumerate: (e) Korolev, A.; Mur, V. Dokl. Akad. Nauk USSR 1948, 59, 251. (f) Korolev, A.; Mur, V. Chem. Abstr. 1948, 42, 6776. (g) Walborsky, H. M.; Barash, L.; Davis, T. C. Tetrahedron 1963, 19, 2333. (h) Walborsky, H. M.; Barash, L.; Davis, T. C. J. Org. Chem. 1961, 26, 4778.
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(a) MM2* is a modified version of Allinger's MM2 force field: Allinger, N. L. J. Am. Chem. Soc. 1977, 99, 8127. (b) MACROMODEL V5: Mohamadi, F.; Richards, N. G. J.; Guida, W. C.; Liskamp, R.; Caufield, C.; Chang, G.; Hendrickson, T.; Still, W. C. J. Comput. Chem. 1990, 11, 440.
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(a) MM2* is a modified version of Allinger's MM2 force field: Allinger, N. L. J. Am. Chem. Soc. 1977, 99, 8127. (b) MACROMODEL V5: Mohamadi, F.; Richards, N. G. J.; Guida, W. C.; Liskamp, R.; Caufield, C.; Chang, G.; Hendrickson, T.; Still, W. C. J. Comput. Chem. 1990, 11, 440.
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43
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0000652745
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The reaction of ethylene and butadiene is exothermic by 36.6 kcal/mol (ref 8)
-
(a) The reaction of ethylene and butadiene is exothermic by 36.6 kcal/mol (ref 8). (b) The experimental barrier of the reaction of 1,3- butadiene and ethylene is 25.1 ± 2 kcal/mol: Houk, K. N.; Li, Y.; Evanseck, J. D. Angew. Chem. 1991, 104, 711; Angew. Chem., Int. Ed. Engl. 1991, 31, 682. (c) The experimental heat of formation is 38.5 kcal/mol: Uchiyama, M.; Tomioka, T.; Amano, A. J. Phys. Chem. 1964, 68, 1878.
-
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44
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0000652745
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(a) The reaction of ethylene and butadiene is exothermic by 36.6 kcal/mol (ref 8). (b) The experimental barrier of the reaction of 1,3-butadiene and ethylene is 25.1 ± 2 kcal/mol: Houk, K. N.; Li, Y.; Evanseck, J. D. Angew. Chem. 1991, 104, 711; Angew. Chem., Int. Ed. Engl. 1991, 31, 682. (c) The experimental heat of formation is 38.5 kcal/mol: Uchiyama, M.; Tomioka, T.; Amano, A. J. Phys. Chem. 1964, 68, 1878.
-
(1991)
Angew. Chem.
, vol.104
, pp. 711
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Houk, K.N.1
Li, Y.2
Evanseck, J.D.3
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45
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0000652745
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(a) The reaction of ethylene and butadiene is exothermic by 36.6 kcal/mol (ref 8). (b) The experimental barrier of the reaction of 1,3- butadiene and ethylene is 25.1 ± 2 kcal/mol: Houk, K. N.; Li, Y.; Evanseck, J. D. Angew. Chem. 1991, 104, 711; Angew. Chem., Int. Ed. Engl. 1991, 31, 682. (c) The experimental heat of formation is 38.5 kcal/mol: Uchiyama, M.; Tomioka, T.; Amano, A. J. Phys. Chem. 1964, 68, 1878.
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(1991)
Angew. Chem., Int. Ed. Engl.
, vol.31
, pp. 682
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46
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0000652745
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(a) The reaction of ethylene and butadiene is exothermic by 36.6 kcal/mol (ref 8). (b) The experimental barrier of the reaction of 1,3- butadiene and ethylene is 25.1 ± 2 kcal/mol: Houk, K. N.; Li, Y.; Evanseck, J. D. Angew. Chem. 1991, 104, 711; Angew. Chem., Int. Ed. Engl. 1991, 31, 682. (c) The experimental heat of formation is 38.5 kcal/mol: Uchiyama, M.; Tomioka, T.; Amano, A. J. Phys. Chem. 1964, 68, 1878.
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(1964)
J. Phys. Chem.
, vol.68
, pp. 1878
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Uchiyama, M.1
Tomioka, T.2
Amano, A.3
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47
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0345366869
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Since the propadiene moiety is at the "inside" of the former butadiene, it is referred to as "gauche-in".
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Since the propadiene moiety is at the "inside" of the former butadiene, it is referred to as "gauche-in".
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48
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0345366868
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2) ≈ 1
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2) ≈ 1.
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49
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0344504681
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note
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Geometry optimizations starting with either an anti or a gauche-out conformation about the newly formed bond provide the structure of Figure 3.
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50
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0345366867
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In the case of cyclopentene, a typical example for a molecule with an envelope conformation, the ring flip requires only 0.8 kcal/ mol: Cavagnat, D.;Roberts, M. P.; Cavagnat, R. M.; Vahedi-Banisaeid, S. J. Phys. Chem. 1991, 95, 134.
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(1991)
J. Phys. Chem.
, vol.95
, pp. 134
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Cavagnat, D.1
Roberts, M.P.2
Cavagnat, R.M.3
Vahedi-Banisaeid, S.4
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51
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0344504680
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This is the lowest energy conformer. The other conformers are located within 1.7 kcal/mol above it.
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This is the lowest energy conformer. The other conformers are located within 1.7 kcal/mol above it.
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