Methyl groups (CH3) are not solvents, they are functional groups. You might be thinking of methane (CH4), which is the simplest alkane and has a single carbon atom bonded to four hydrogen atoms.

While methane is a gas at room temperature and pressure, it is not a good extraction solvent for several reasons:

1. Low polarity: Methane is extremely non-polar due to its symmetrical structure and the lack of any polar bonds. This makes it poor at dissolving polar compounds.

2. Low boiling point: Methane has a very low boiling point (-161.5 °C) which makes it difficult to use as a solvent at standard temperatures.

3. Safety concerns: Methane is highly flammable and a potent greenhouse gas.

4. Poor solubility: Methane has very limited solubility in water and other common solvents.

In summary, methane is a poor extraction solvent due to its non-polar nature, low boiling point, safety concerns, and limited solubility.

For effective extraction, solvents with appropriate polarity and solubility properties are needed. Common solvents used in extraction include:

* Hexane: A non-polar solvent used for extracting non-polar compounds like fats and oils.

* Dichloromethane: A moderate polarity solvent used for extracting a variety of compounds.

* Ethanol: A polar solvent used for extracting polar compounds like sugars and alcohols.

Remember, the choice of solvent depends on the specific compounds being extracted and their properties.