Stereoisomers which are not mirror images and are not superimposable to each other are called

Options

A. mesomers
B. tautomers
C. diastereomers
D. enantiomers

Answer

To solve the question regarding stereoisomers that are not mirror images and are not superimposable to each other, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Stereoisomers**:
- Stereoisomers are compounds that have the same molecular formula and connectivity of atoms but differ in the spatial arrangement of atoms.

2. **Types of Stereoisomers**:
- There are two main types of stereoisomers:
- **Enantiomers**: These are stereoisomers that are mirror images of each other and are non-superimposable.
- **Diastereomers**: These are stereoisomers that are not mirror images of each other and are also non-superimposable.

3. **Identifying the Question**:
- The question specifically asks for stereoisomers that are neither mirror images nor superimposable.

4. **Conclusion**:
- Based on the definitions, the correct term for stereoisomers that are not mirror images and are not superimposable is **Diastereomers**.

### Final Answer:
- The stereoisomers which are not mirror images and are not superimposable to each other are called **Diastereomers**.