| Thus, each bond between a carbon and a heteroatom is polar, and the degree of polarity depends on the difference between the electron-attracting properties of the two atoms. |
| Another common reaction, useful in the formation of ring systems containing a heteroatom such as nitrogen, is the hetero-Diels-Alder reaction. |
| The problem that occurs is that the major constituents of all of these new materials are hydrocarbon or heteroatom based. |
| Two types of catalysts were used to compare their activities at heteroatom removal. |
| With only one heteroatom participating in resonance stabilization, the effect of the photolysis of the triarylmethanol on the binding constant will be maximal. |
| The heteroatom compounds such as asphaltenes exist as colloidal dispersions in crude oil and were peptized by other components present in the oil. |
