The principal idea of this volume is to offer a Capita Selecta of unconventional and thought-provoking topics in organometallic chemistry, presented by experts in each field. As intended, this approach leads either to reviews covering a specific uncommon class of organometallic compounds or to overviews which relate uncommon physical properties with various classes of organometallic compounds. Content: Structure and electrochemistry of transition metal carbonyl clusters with interstitial or semi-interstitial atoms: contrast between nitrides or phosphides and carbides / Piero Zanello — Unusual nuclear magnetic shielding and coupling constants related to unusual bonding situations / Bernd Wrackmeyer — Deuterium spin lattice relaxation and deuterium quadrupole coupling constants. A novel strategy for characterization of transition metal hydrides and dihydrogen complexes in solution / Vladimir I. Bakhmutov — NMR studies of ligand nuclei in organometallic compounds — new information from solid-state NMR techniques / Guy M. Bernard, Roderick E. Wasylishen — Metal atom motion in some iron organometallics / Rolfe H. Herber — Magnetic communication in binuclear organometallic complexes mediated by carbon-rich bridges / Frd?r?ic Paul, Claude Lapinte — Molecular cluster complexes with facial arene ligands / Herbert Wadepohl — Cobaltafulvenes and cobaltapentalenes: highly polar metallacyclic II-systems with unusual properties / Herbert Wadepohl — Novel highly nucleophilic ylidic ligands for the preparation of unusually stable metal complexes / Norbert Kuhn, Martin Go?hner, Gernot Frenking, Yu Chen — Supramolecular interactions in structures of organic antimony and Bismuth compounds / Gabor Balz?s, Hans Joachim Breunig. Abstract: The principal idea of this volume is to offer a Capita Selecta of unconventional and thought-provoking topics in organometallic chemistry, presented by experts in each field. As intended, this approach leads either to reviews covering a specific uncommon class of organometallic compounds or to overviews which relate uncommon physical properties with various classes of organometallic compounds