ライフサイエンスコーパス: hyperconjugation

1 ely dependent on dipolar interactions (or on hyperconjugation).

2 ic substituent effects such as resonance and hyperconjugation.

3 ron withdrawal by the fluorines, rather than hyperconjugation.

4 e planar) are evaluated in terms of negative hyperconjugation.

5 ruled by dipolar interactions rather than by hyperconjugation.

6 electronic ground-state destabilization via hyperconjugation.

7 allylic silane and stabilization of pi cc by hyperconjugation.

8 manner controlled by chelation and negative hyperconjugation.

9 refrom, C[bond]OO* BDEs are also affected by hyperconjugation.

10 result of preferential stabilization through hyperconjugation.

11 ccurs in alkoxide anions as a consequence of hyperconjugation.

12 nformational preferences in terms of steric, hyperconjugation and dispersion effects.

13 d on the basis of sigma(C-H) --> sigma*(C-F) hyperconjugation and electrostatic interactions.

14 more pronounced indicates that the negative hyperconjugation and pi-resonance within the carboxylate

15 of the Ni+1-H...Ni interaction ablates this hyperconjugation and thus induces an otherwise difficult

16 dicate that various structural (ring strain, hyperconjugation, anomeric effects) and environmental (b

17 appears to occur primarily through a type of hyperconjugation, as demonstrated by a decrease in the b

18 conformation for ribose and relatively weak hyperconjugation at the transition state.

19 ns, probably arising from different types of hyperconjugation between lone electron pairs of nitrogen

20 A [methyl-3H(3)] KIE is due to hyperconjugation between np of sulfur and sigma* of meth

21 It is hypothesized that hyperconjugation between the C4 C-N/O bond and the parti

22 n hydride transfer is thought to result from hyperconjugation between the carbonyl group and C-4 of t

23 specific beta-deuterium KIEs indicate strong hyperconjugation between the elongated glycosidic bond a

24 tate suggests that the 4'-(3)H KIE is due to hyperconjugation between the lone pair (n(p)) of O3' and

25 tions suggest that the 4'-3H KIE arises from hyperconjugation between the lonepair (n(p)) of O4' and

26 group, and the methyl-(3)H(3) KIE is due to hyperconjugation between the n(p) of sulfur and the sigm

27 on of this difference is consistent with C-H hyperconjugation conferring aromatic character on the ar

28 When hyperconjugation dominates, X[bond]H bond elongation is

29 The hyperconjugation effect in the substituted methyl borane

30 , due to intramolecular hydrogen bonding and hyperconjugation effects.

31 lanation given for this effect at present is hyperconjugation from the lone pairs on the ring heteroa

32 nduced weakening of the central C-C bond and hyperconjugation has been considered to be involved, but

33 s a conformational isomer stabilized through hyperconjugation (hyperconjomers).

34 damental knowledge about how conjugation and hyperconjugation impact the stabilization of nonbonding

35 s a chemical method to obtain insight on the hyperconjugation in hydrazide derivatives from solution

36 These results reveal the periodic trend for hyperconjugation in the chalcogens, which reflect a decr

37 ers the 2-substituent itself is oriented for hyperconjugation in the initially formed conformation of

38 rism and on the ability to induce a stronger hyperconjugation in the resulting compounds.

39 bond theory, we have evaluated the degree of hyperconjugation in various compounds that display the a

40 Removal of hyperconjugation interactions yields the eclipsed struct

41 Hyperconjugation is a controlling factor which determine

42 Stabilization by negative hyperconjugation is proposed for 1,2-dihydroxycyclohexad

43 de anion is stabilized by aromatic "negative hyperconjugation" is described.

44 itude of the beta-silyl effect (the Si-C-Si+ hyperconjugation) is gauged as a function of structure.

45 he activation of the anti proton by negative hyperconjugation may also play a role in the concerted p

46 eukaryotic cells infected with M. smegmatis hyperconjugation mutants.

47 ond in fluoroalkene 1b is found to be due to hyperconjugation of the eight C-F bonds in 1b with the f

48 ] KIEs arise predominantly from the negative hyperconjugation of the lone pairs of sulfur with the si

49 The effect of negative hyperconjugation on the solvolytic behavior of carbonate

50 An earlier study demonstrated that hyperconjugation operates in hydrazides by analyzing the

51 participation of remote substituents (double hyperconjugation or through-bond interaction).

52 ertions or deletions that cause early lysis, hyperconjugation, or an increased plasmid copy number.

53 Negative hyperconjugation provides a satisfactory explanation for

54 ectronic structure calculations suggest that hyperconjugation reduces the stability of the ethylperox

55 g group facilitates the addition by negative hyperconjugation; the twist-boat conformation of the add

56 Several modes of internal stabilization-hyperconjugation, transannular pi(alkene)...C(+) and tra

57 Hyperconjugation underlies many chemical phenomena of fu

58 The importance of double hyperconjugation was investigated computationally using

59 Increasing the degree of pi-conjugation and hyperconjugation was shown to benefit allyl radicals to

60 te conformations where the extent of beta-CH hyperconjugation was similar to that in the free substra

61 f the cyclopropane ring bond through orbital hyperconjugation, which facilitates the hydrogen transfe

62 uencies are shifted to lower energies due to hyperconjugation with Ni electron density, and engaging

63 possesses a 2-C-H bond suitably oriented for hyperconjugation with the charge center.

64 nd-state destabilization of the C-H bond via hyperconjugation with the conjugated Schiff base/pyridin