title: First Insertions of Carbene Ligands into Ge-N and Si-N Bonds.
abstract: The insertion of carbene ligands into Ge-N (three examples) and Si-N (one example) bonds has been achieved for the first time by treating Fischer carbene complexes (M=W, Cr) with bulky amidinatotetrylenes (E=Ge, Si). These reactions, which start with a nucleophilic attack of the amidinatotetrylene heavier group 14 atom to the carbene C atom, proceed through a stereoselective insertion of the carbene fragment into an E-N bond of the amidinatotetrylene ENCN four-membered ring, leading to [M(CO)5L] derivatives in which L belongs to a novel family of tetrylene ligands comprising an ECNCN five-membered ring.
authors.affiliation: Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.|Departamento de Química Orgánica e Inorgánica-IUQOEM, Universidad de Oviedo-CSIC, 33071, Oviedo, Spain.
authors.forename: Lucía
authors.identifier: http://orcid.org/0000-0003-3176-3855
authors.initials: L
authors.lastname: Álvarez-Rodríguez
authors.affiliation: Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.|Departamento de Química Orgánica e Inorgánica-IUQOEM, Universidad de Oviedo-CSIC, 33071, Oviedo, Spain.
authors.forename: Javier A
authors.identifier: http://orcid.org/0000-0001-8563-9193
authors.initials: JA
authors.lastname: Cabeza
authors.affiliation: Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.|Departamento de Química Orgánica e Inorgánica-IUQOEM, Universidad de Oviedo-CSIC, 33071, Oviedo, Spain.
authors.forename: Pablo
authors.identifier: http://orcid.org/0000-0002-5024-3874
authors.initials: P
authors.lastname: García-Álvarez
authors.affiliation: Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.|Departamento de Química Orgánica, Universidad Complutense, 28040, Madrid, Spain.
authors.forename: Mar
authors.identifier: http://orcid.org/0000-0002-8961-7685
authors.initials: M
authors.lastname: Gómez-Gallego
authors.affiliation: Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.|Departamento de Química Orgánica, Universidad Complutense, 28040, Madrid, Spain.
authors.forename: Alba D
authors.identifier: http://orcid.org/0000-0003-1088-413X
authors.initials: AD
authors.lastname: Merinero
authors.affiliation: Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain.|Departamento de Química Orgánica, Universidad Complutense, 28040, Madrid, Spain.
authors.forename: Miguel A
authors.identifier: http://orcid.org/0000-0002-3360-7795
authors.initials: MA
authors.lastname: Sierra
keywords: Fischer carbenes; carbene insertion; germanium; silicon; tetrylenes