The Helical Coordination Polymer Ag(Nic) 2 (NO 3 )

Single crystals of Ag(Nic) 2 (NO 3 ) were obtained from an aqueous solution of silver nitrate and nicotine as plate‐like colourless crystals. The crystal structure (monoclinic, P2 1 , Z = 2, a = 933.3(2), b = 1136.8(2), c = 1024.3(2) pm, β = 94.49(2)°) consists of helical chains in which one nicotine molecule bridges with both the pyridine‐N and the pyrrol‐N coordinating and with a second nicotine molecule terminally coordinating with the pyridine‐N. A monodentate nitrate‐O is completing the coordination sphere of Ag + to a distorted tetrahedron. Ag–N distances (229‐240 pm) attest for a rather strong attraction of the nicotine molecules to Ag(I) and thereby constitute essentially a one‐dimensional, helical coordination polymer according to the formulation Ag(Nic1) 2/2 (Nic2) 1/1 (NO 3 ) 1/1 .