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Insight into the regioselectivity of the pericyclic reaction was obtained with the help of deuterium\u2010labeling experiments. The silyl\u2010phosphinine acts as a ligand for the preparation of a Cu(I) and the first crystallographically characterized phosphinine\u2010Ag(I) complex. The title compound was further used as a starting material for an alternative preparation of the parent phosphinine C<jats:sub>5<\/jats:sub>H<jats:sub>5<\/jats:sub>P by means of protodesilylation with HCl. C<jats:sub>5<\/jats:sub>H<jats:sub>5<\/jats:sub>P reacts with CuBr\u22c5S(CH<jats:sub>3<\/jats:sub>)<jats:sub>2<\/jats:sub> to give an infinite Cu(I)Br coordination polymer. DFT calculations shed light on the influence of the \u2010Si(CH<jats:sub>3<\/jats:sub>)<jats:sub>3<\/jats:sub> group on the electronic properties of the aromatic phosphorus heterocycle.<\/jats:p>","DOI":"10.1002\/chem.201704539","type":"journal-article","created":{"date-parts":[[2017,10,25]],"date-time":"2017-10-25T05:08:47Z","timestamp":1508908127000},"page":"944-952","source":"Crossref","is-referenced-by-count":50,"title":["2\u2010(Trimethylsilyl)\u2010\u03bb<sup>3<\/sup>\u2010Phosphinine: Synthesis, Coordination Chemistry, and Reactivity"],"prefix":"10.1002","volume":"24","author":[{"given":"Marija H.","family":"Habicht","sequence":"first","affiliation":[{"name":"Institut f\u00fcr Chemie und Biochemie Freie Universit\u00e4t Berlin  Fabeckstr. 34\/36 14195 Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Friedrich","family":"Wossidlo","sequence":"additional","affiliation":[{"name":"Institut f\u00fcr Chemie und Biochemie Freie Universit\u00e4t Berlin  Fabeckstr. 34\/36 14195 Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tobias","family":"Bens","sequence":"additional","affiliation":[{"name":"Institut f\u00fcr Chemie und Biochemie Freie Universit\u00e4t Berlin  Fabeckstr. 34\/36 14195 Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Evgeny A.","family":"Pidko","sequence":"additional","affiliation":[{"name":"ITMO University  Lomonosova 9 St. Petersburg 191002 Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian","family":"M\u00fcller","sequence":"additional","affiliation":[{"name":"Institut f\u00fcr Chemie und Biochemie Freie Universit\u00e4t Berlin  Fabeckstr. 34\/36 14195 Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,12,11]]},"reference":[{"key":"e_1_2_7_1_1","unstructured":"\u00a0"},{"key":"e_1_2_7_2_2","unstructured":"Phosphorus-Carbon Heterocyclic Chemistry: The Rise of a New Domain(Ed.: F. 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