Small-angle neutron scattering (SANS) has been applied to investigate the solution state characteristics of pyridine extracts obtained from three Argonne Premium coals : APCS No. 3, 2, and 8. In order to investigate the role of specific solvent-solute interactions, both untreated and O-methylated extracts were investigated. SANS analysis reveals that the solution structure of lower rank coal extracts exist as small particles, with radii similar to 80 Angstrom, which loosely aggregate into topologically complex solution structures. Details on the structure of the aggregates are obtained from the scattering behavior at low and by assuming a pair correlation function which follows a power law decay from the center to the perimeter of the aggregate. The dimensionality of the aggregates indicates mass fractal topology. Changes in the solution state due to O-methylation are manifested in densification of the extended solution structure. The size and shape of the elemental particles appear unaffected by the derivatization chemistry.