MS21-P07 'Pancake' bonding: a charge density perspectiveDelia Haynes(Department of Chemistry & Polymer Science, Stellenbosch University, Stellenbosch, South Africa)email: dhaynes@sun.ac.zaA class of thiazyl radicals, 1,2,3,5-dithiadiazolyls (R-CNSSN•, hereafter DTDAs), have been the focus of much investigation due to their potential as building blocks for magnetic and conducting materials. [1] However, these molecules tend to dimerise in the solid state via a spin-pairing interaction known as 'pancake bonding' [2], rendering them diamagnetic. Experimental charge density analysis has been carried out on a number of DTDA homodimers, heterodimers and monomers. [3] These data, as well as various computational results, are assessed to probe the nature of the 'pancake bonds' in DTDAs. References: