CGMT model

The CGMT model was intended to describe (non-cyclic) homonuclear and heteronuclear double-bonded systems. However, in the meantime other multiple-bonded species have also been synthesized, as will be seen in the following. They also often exhibit structural features which are not familiar from the analogous carbon derivatives, and are not yet fully understood. Some of them are, however, related to the phenomena discussed above and may be understood on a similar base. I will not go into details in these cases, but will refer to recent literature when available. 

According to the CGMT model the skeleton of ditetrenes R2E=ER2 bearing organyl or related non-donor substituents may exhibit at least two possible ideal conformations ... 

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