title: Effect of the Metal Ion on the Enantioselectivity and Linkage Isomerization of Thiosemicarbazone Helicates.
abstract: The effect of the metal ion and ligand design on the enantioselectivity and linkage isomerization of neutral cobalt and zinc bisthiosemicarbazone metallohelicates has been investigated in this work. The electrochemical synthesis has afforded the enantioselective formation of chirally pure cobalt helicates, and the ΛΛ isomer of a single enantiomer has been crystallized as only product for the cobalt methyl-substituted thiosemicarbazone helicate. Interestingly linkage isomers have been formed from zinc ethyl-substituted thiosemicarbazone helicate enantiomers for the first time. The co-existence of these isomers has been evaluated from the point of view of both experimental results and computational calculations.
authors.affiliation: Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain.
authors.forename: María J
authors.identifier: http://orcid.org/0000-0002-6299-4325
authors.initials: MJ
authors.lastname: Romero
authors.affiliation: Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain.
authors.forename: Vanesa
authors.initials: V
authors.lastname: Suárez
authors.affiliation: Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain.
authors.forename: Sandra
authors.initials: S
authors.lastname: Fernández-Fariña
authors.affiliation: Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, 27002, Lugo, Spain.
authors.forename: Marcelino
authors.identifier: http://orcid.org/0000-0003-1258-3517
authors.initials: M
authors.lastname: Maneiro
authors.affiliation: Departamento de Química Física, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain.
authors.forename: Emilio
authors.identifier: http://orcid.org/0000-0001-6221-4977
authors.initials: E
authors.lastname: Martínez-Núñez
authors.affiliation: Unidade de Difracción de Raios X, Edificio CACTUS, Universidade de Santiago de Compostela, Campus Sur, Santiago de Compostela, Galicia, 15782, Spain.
authors.forename: Guillermo
authors.identifier: http://orcid.org/0000-0002-2550-6628
authors.initials: G
authors.lastname: Zaragoza
authors.affiliation: Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain.
authors.forename: Ana M
authors.identifier: http://orcid.org/0000-0002-5423-1934
authors.initials: AM
authors.lastname: González-Noya
authors.affiliation: Departamento de Química Inorgánica, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Santiago de Compostela, Galicia, 15782, Spain.
authors.forename: Rosa
authors.identifier: http://orcid.org/0000-0002-6161-4108
authors.initials: R
authors.lastname: Pedrido
keywords: electrochemical synthesis; enantioselectivity; helical structures; ligand design; linkage isomerization