N-(6-Bromo-meth-yl-2-pyrid-yl)acetamide

Area of Science:

• Crystallography
• Chemical Crystallography
• Organic Chemistry

Background:

• Understanding the three-dimensional arrangement of atoms in organic compounds is crucial for predicting their properties and reactivity.
• Acetamide derivatives are important in medicinal chemistry and materials science.
• Detailed crystallographic studies provide fundamental insights into molecular interactions and solid-state structures.

Purpose of the Study:

• To determine and analyze the crystal structure of the acetamide compound C(8)H(9)BrN(2)O.
• To investigate the molecular conformation and the presence of independent molecules within the asymmetric unit.
• To elucidate the intermolecular interactions, including hydrogen bonding and C-H···π interactions, that stabilize the crystal lattice.

Main Methods:

• Single-crystal X-ray diffraction was employed to collect diffraction data.
• The crystal structure was solved and refined using standard crystallographic software.
• Analysis of bond lengths, bond angles, dihedral angles, and intermolecular interactions was performed.

Main Results:

• The acetamide compound C(8)H(9)BrN(2)O crystallizes with three independent molecules (A, B, and C) in the asymmetric unit.
• Significant variations in the dihedral angles between the acetamide unit and the pyridine ring were observed across the three molecules (4.40(11)°, 10.31(12)°, and 2.27(11)°).
• The crystal structure is characterized by sheets formed through N-H⋯O, C-H⋯Br, C-H⋯O, and C-H⋯N hydrogen bonds, further stabilized by C-H⋯π interactions.

Conclusions:

• The crystal structure of C(8)H(9)BrN(2)O exhibits conformational diversity among independent molecules.
• Hydrogen bonding and weak C-H⋯π interactions play a significant role in the self-assembly and stabilization of the crystal packing.
• This detailed structural analysis provides a foundation for understanding structure-property relationships in related acetamide derivatives.