"Heterocyclic compounds." . . "Transition metals." . . . . "Stickstoffheterocyclen." . . "Stickstoffheterocyclen" . "Heterocyclic chemistry." . . . . "Electronic books"@en . "Electronic books" . . . . . . . . "N-heterocyclic carbenes : effective tools for organometallic synthesis"@en . . . . "Aufsatzsammlung" . . . "N-Heterocyclic carbenes : effective tools for organometallic synthesis" . . "N-Heterocyclic Carbenes : Effective Tools for Organometallic Synthesis" . "N-Heterocyclic Carbenes Effective Tools for Organometallic Synthesis"@en . . "N-Heterocyclic Carbenes Effective Tools for Organometallic Synthesis" . . . . . . "Carbene." . . "Carbene" . "SCIENCE Chemistry Organic." . . "Organometallic compounds Synthesis." . . "Carbenes (Methylene compounds)" . . "Metallorganische Chemie." . . "Metallorganische Chemie" .