Crystal structure and hydrogen-bonding patterns in 5-fluoro-cytosinium picrate.
In the crystal structure of the title compound, 5-fluoro-cytosinium picrate, C4H5FN3O+·C6H2N3O7-, one N heteroatom of the 5-fluoro-cytosine (5FC) ring is protonated. The 5FC ring forms a dihedral angle of 19.97 (11)° with the ring of the picrate (PA-) anion. In the crystal, the 5FC+cation inter-acts with the PA-anion through three-centre N-H⋯O hydrogen bonds, forming two conjoined rings havingR21(6) andR12(6) motifs, and is extended by N-H⋯O hydrogen bonds and C-H⋯O inter-actions into a two-dimensional sheet structure lying parallel to (001). Also present in the crystal structure are weak C-F⋯π inter-actions.
School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.
Marimuthu
M
Mohana
School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.
Packianathan
P
Thomas Muthiah
Department of Chemistry, Clemson University, 379 H.L. Hunter Laboratories, Clemson, SC 29634, USA.
Colin D
CD
McMillen
5-fluoro­cytosine; bifurcated inter­actions; crystal structure; hydrogen bonding; picrate