Germene 1 reacts with the CO and CS double bonds respectively of phenylisocyanate and methylisothiocyanate by [2+ 2] cycloadditions, leading to four-membered ring derivatives. With CS2, a dithiagermolane and a dithiadigermetane are obtained; the first step of this ...
![5'-(9H-fluoren-9-ylidene)-2',2'-dimesitylspiro[fluorene-9,3'-[1,4,2]dithiagermolane] Structure](https://image.chemsrc.com/caspic/119/869119-96-0.png)