... by para-hydrogen induced polarization Andreas Harthun,a Ralf Giernoth," Cornelis J. Elsevierb and Joachim Bargon*a a Institute of Physical and Theoretical Chemistry, University of Bonn, Wegelerstrasse 1 2 , 0 4 3 1 15 Bonn, Germany ... Commun., 1996, 383 and references therein; P. Kating, A. Wandelt, R. Selke and J. Bargon, J. Phys. Chem., 1993, 97, 13313; A. Harthun, K. Woelk, A. Weigt and J. Bargon, Tetrahedron, 1995, 51, 11 199. ...