Introduction:
CCL2, also known as monocyte chemoattractant protein-1 (MCP-1), is a chemokine that mediates migration and infiltration of monocytes/macrophages to inflammatory sites. Its chemical formula is C10H13Cl2NO, and its molecular weight is 241.13 g/mol. To determine whether CCL2 is a Lewis acid or a Lewis base, we need to understand the concepts of Lewis acid and Lewis base.

Lewis Acid and Lewis Base:
A Lewis acid is a substance that can accept a pair of electrons to form a covalent bond, while a Lewis base is a substance that can donate a pair of electrons to form a covalent bond. In other words, a Lewis acid is an electron pair acceptor, and a Lewis base is an electron pair donor.

CCL2 as a Lewis Acid:
CCL2 does not have any available electron pairs to accept electrons, so it cannot act as a Lewis acid. It does not have a metal ion or a positive charge that can attract electron pairs, which is the characteristic of Lewis acids. Therefore, we can conclude that CCL2 is not a Lewis acid.

CCL2 as a Lewis Base:
CCL2 has several electron-rich functional groups, such as the carbonyl group (-C=O), the amine group (-NH2), and the chloride group (-Cl). These functional groups can donate electron pairs to form covalent bonds with other electron-deficient molecules or ions. Therefore, CCL2 can act as a Lewis base by donating its electron pairs to form a covalent bond with a Lewis acid.

Conclusion:
In conclusion, CCL2 is not a Lewis acid but can act as a Lewis base. It has several electron-rich functional groups that can donate electron pairs to form covalent bonds with other electron-deficient molecules or ions.

It is a Lewis acid bcz C is the central atom is normally sourround by highly electronegative atoms or electron withdrawing group