Example sentences of "a 1 ['s] " in BNC.
Next page| No | Sentence |
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| 1 | Out of all possible motions of the six atoms , there are therefore two of a 1 ' symmetry . |
| 2 | Only a 1 ' , e' and e " vibrations will be Raman active , so we expect six fundamental bands in the Raman spectrum , only three of which ( due to the three e' vibrations ) should coincide in frequency with IR bands . |
| 3 | That leaves us with modes of a 1 ' and e " symmetry , which are forbidden in the IR but active in the Raman . |
| 4 | We can now complete the assignment for PF 5 , by distinguishing between the a 1 ' and e " modes . |
| 5 | The two a 1 ' modes will be polarized . |
| 6 | Some authors order the symmetry species a 1 ' , a 2 ' , e' , a 1 ' , a 2 " , e " , regarding the '/ " distinction as most important . |
| 7 | Some authors order the symmetry species a 1 ' , a 2 ' , e' , a 1 ' , a 2 " , e " , regarding the '/ " distinction as most important . |
| 8 | Others treat the symmetry with respect to the 3-fold axis as more important , ordering the species as a 1 ' , a 1 " , a 2 ' , a 2 " , e' , e " . |
| 9 | This clearly results in a different numbering of all modes except those of symmetry species a 1 ' and e " . |
| 10 | IV ) are all symmetry-related , giving a 1 ' , b 2 ' and e' stretching modes , only one of which one ( e' ) is IR-active and all three are Raman active . |