例句與造句

1. He is notable for his work on chemical compounds with unusual valency, especially in the field of stable carbene research.
2. These acyclic carbenes have diagnostic 13 C NMR chemical shift values between 250 300 ppm for the carbenic carbon, further downfield than any other types of stable carbene.
3. The dimer ( a substituted tetraaminoethylene ) was believed to be inactive to the electrophiles ( E-X ), and thought to merely act as a stable carbene reservoir.
4. Tetraaminoethylenes are important in organic chemistry as dimers of diaminocarbenes, a type of stable carbene with the general formula ( R 2 N ) 2 C "': " '.
5. It's difficult to find stable carbene in a sentence. 用stable carbene造句挺難的