2026-08-20T15:41:14Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1238382025-09-12T00:07:41Zcom_20.500.14352_14col_20.500.14352_15

Stepwise Acetylene Insertion and Ammonia Activation at a Digallene and Diindene García Romero, A. Fernández López, Israel Goicoechea, J. M. 547 Ammonia activation Cyclization reactions Digallenes Diindenes Main-group chemistry Química 23 Química Sequential [2 + 2] cycloaddition reactions between acetylene and the digallene and diindene compounds (ETer)2 (E = Ga, In; Ter = 2,6-Dipp2-C6H3; Dipp = 2,6-diisopropylphenyl) are described. Careful control of the reaction conditions leads to selective formation of four- and six-membered rings with 2π E2C2 and 4π E2C4 cores, respectively. A structural analysis of the heterocycles by single crystal X-ray diffraction suggests limited electronic delocalization within the rings, which is borne out in their reactivity. For example, the six-membered cyclohexadiene analogues exhibit Lewisacidic behavior and can form stable, isolable adducts with ammonia. Upon heating, these adducts transform into the corresponding bimetallic triel amides with concomitant generation of ethene. NationalScience Foundatio IndianaUniversity Ministerio de Ciencia, Innovación y Universidades Depto. de Química Orgánica Fac. de Ciencias Químicas TRUE pub 2025-09-11T10:24:31Z 2025-09-11T10:24:31Z 2025-08-04 journal article VoR https://hdl.handle.net/20.500.14352/123838 XXXX-XXXX 10.1002/anie.202509661 eng info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-139318NB-I00/ES/ENTENDIENDO LOS FACTORES QUE CONTROLAN LA REACTIVIDAD EN GRUPOS PRINCIPALES/ RED2022-134287-T Á. García-Romero, I. Fernández, J. M. Goicoechea, Angew. Chem. Int. Ed. 2025, 64, e202509661. https://doi.org/10.1002/anie.202509661 open access application/pdf Wiley