{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:56:30Z","timestamp":1760241390685,"version":"build-2065373602"},"reference-count":34,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2018,2,14]],"date-time":"2018-02-14T00:00:00Z","timestamp":1518566400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["PTDC\/QEQ-SUP\/1413\/2012","UID\/Multi\/04349\/2013","SFRH\/BD\/86131\/2012","SFRH\/BD\/84628\/2012"],"award-info":[{"award-number":["PTDC\/QEQ-SUP\/1413\/2012","UID\/Multi\/04349\/2013","SFRH\/BD\/86131\/2012","SFRH\/BD\/84628\/2012"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Gold and nickel bisdithiolene complexes with methyl and tert-butyl substituted thiophenetetrathiafulavalenedithiolate ligands (\u03b1-mtdt and \u03b1-tbtdt) were prepared and characterized. These complexes were obtained, under anaerobic conditions, as tetrabutylammonium salts. The diamagnetic gold monoanion (n-Bu4N)[Au(\u03b1-mtdt)2] (3) and nickel dianionic species (n-Bu4N)x[Ni(\u03b1-mtdt)2] (x = 1,2) (4) were similar to the related non-substituted extended thiophenic-TTF (TTF = tetrathiafulvalene) bisdithiolenes. However the introduction of the large, bulky substituent tert-butyl, led to the formation of a Au (I) dinuclear complex, (n-Bu4N)2[Au2(\u03b1-tbtdt)2] (5). The neutral methyl substituted gold and nickel complexes were easily obtained through air or iodine exposure as polycrystalline or amorphous fine powder. [Au(\u03b1-mtdt)2] (6) and [Ni(\u03b1-mtdt)2] (7) polycrystalline samples display properties of a metallic system with a room temperature electrical conductivity of 0.32 S\/cm and \u22484 S\/cm and a thermoelectric power of \u22485 \u00b5V\/K and \u224832 \u00b5V\/K, respectively. While [Au(\u03b1-mtdt)2] (6) presented a Pauli-like magnetic susceptibility typical of conducting systems, in [Ni(\u03b1-mtdt)2] (7) large magnetic susceptibilities indicative of high spin states were observed. Both electric transport properties and magnetic properties for gold and nickel [M(\u03b1-mtdt)2] are indicative that these compounds are single component molecular conductors.<\/jats:p>","DOI":"10.3390\/molecules23020424","type":"journal-article","created":{"date-parts":[[2018,2,14]],"date-time":"2018-02-14T14:01:20Z","timestamp":1518616880000},"page":"424","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Gold and Nickel Extended Thiophenic-TTF Bisdithiolene Complexes"],"prefix":"10.3390","volume":"23","author":[{"given":"Rafaela","family":"Silva","sequence":"first","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]},{"given":"Bruno","family":"Vieira","sequence":"additional","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]},{"given":"Marta","family":"Andrade","sequence":"additional","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8350-480X","authenticated-orcid":false,"given":"Isabel","family":"Santos","sequence":"additional","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5324-8013","authenticated-orcid":false,"given":"Sandra","family":"Raba\u00e7a","sequence":"additional","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]},{"given":"Elsa","family":"Lopes","sequence":"additional","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]},{"given":"Joana","family":"Coutinho","sequence":"additional","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8818-0039","authenticated-orcid":false,"given":"Laura","family":"Pereira","sequence":"additional","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2222-5641","authenticated-orcid":false,"given":"Manuel","family":"Almeida","sequence":"additional","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1571-6904","authenticated-orcid":false,"given":"Dulce","family":"Belo","sequence":"additional","affiliation":[{"name":"C<sup>2<\/sup>TN, Centro de Cie\u0302ncias e Tecnologias Nucleares, Instituto Superior Te\u0301cnico, Universidade de Lisboa, E.N. 10 ao km 139.7, 2695-066 Bobadela LRS, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2018,2,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"511","DOI":"10.1002\/1521-3765(20010119)7:2<511::AID-CHEM511>3.0.CO;2-5","article-title":"Gold complexes with dithiothiophene ligands: A metal based on a neutral molecule","volume":"7","author":"Belo","year":"2001","journal-title":"Chemistry"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"285","DOI":"10.1126\/science.291.5502.285","article-title":"A three-dimensional synthetic metallic crystal composed of single-component molecules","volume":"291","author":"Tanaka","year":"2001","journal-title":"Science"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"699","DOI":"10.1016\/S0379-6779(00)01150-4","article-title":"New dithiothiophene complexes for conducting and magnetic materials","volume":"120","author":"Belo","year":"2001","journal-title":"Synth. 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