2D 7 Li Ultrafast CT-COSY: a new tool for the rapid measurement of tiny homonuclear lithium scalar couplings. G. Hamdoun, a B. Gouilleux, b M. Sebban, a G. Barozzino-Consiglio, a A. Harrison-Marchand, a P. Giraudeau, b,c J. Maddaluno a and H. Oulyadi* ,a a. Normandie Univ, UNIROUEN, INSA Rouen, CNRS, COBRA (UMR 6014 & FR 3038), 76000 Rouen, France b. CEISAM, UMR CNRS 6230, 2 rue de la Houssinière, 44322 Nantes c. Institut Universitaire de France, 1 rue Descartes, 75005, Paris, France Supporting Information Experimental Section Fig. S1: 2D 7 Li UF CT-COSY spectra of a 1 : 1 n-BuLi / MeLi solution as a function of the mixing time t mix . Fig. S2: 2D 7 Li UF CT-COSY spectra of a 1 : 1 n-BuLi / MeLi solution as a function of the adiabatic pulse Tp. Table S1: Lithium 7 T 2 values obtained by a CPMG Sequence at 194 MHz and T = 185 K. Electronic Supplementary Material (ESI) for ChemComm. This journal is © The Royal Society of Chemistry 2016