1. Steric hindrance between adjacent groups can also affect torsional bond angles.

2. 2,2′,6,6′-tetrasubstituted Biphenyls are nonplanar at room temperature in order to avoid steric clashes between the substituents

3. Staggered; Staggered Conformations are a fairly stable conformation as the atoms are spread apart to minimize steric hindrance

4. In this case the mode of action is mostly due to steric repulsion of the adsorbed layer.

5. Aldehydes are usually more reactive toward nucleophilic substitutions than ketones because of both steric and electronic effects

6. The generally accepted “pore model” for diffusion is modified by taking account the steric hindrance of diffusing molecules.

7. Variations in steric crowding in E vs. Z isomers produce chemical shift effects which alternate with the number of intervening bonds.

8. The polyisobutylene chains extend from the pigment surfaces on which the charge control agent is adsorbed, thereby providing a steric barrier between pigments and preventing agglomeration.

9. The Branched alkyl chain modification is often regarded as a counter-intuitive approach, as it may introduce an undesirable steric hindrance that reduces charge transport in …

10. Key words: a-lithiated arylmethylphosphonates, 1,2- vs. 1,4-addition to cyclic enones, steric effects of the cyclohex-2-enone, molecular structure and molecular modelling of the 1,4-adduct of 1-naphthylmethylphosphonate to cyclohex-2-enone.

11. Steric adhesion presupposes no intermolecular or atomic adhesive forces at all between the adherends, but is based on the fact that the molecules of the adhesive are thus formed that after swelling and diffusion processes, they can partly be enclosed by the molecules of the packing-material. So the enclosed molecular segments are firmly stayed in the closedup cavities.

12. The present invention relates to a novel herbicidal composition in the form of a stable emulsifiable concentrate formulation (EC), which contains 2-chloro-2',6'-diethyl- &Lgr;/-(2-propoxyethyl)acetanilide together with benzophenone O-[2,6-bis(4,6- dimethoxypyrimidin-2-yloxy)benzoyl]oxime and at least one steric hindered phenol, and the use of such a composition for controlling undesired vegetation (in particular grasses and/or weeds ) in crops of useful plants, especially in crops of rice.