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The description is based on quantum\u2010chemical calculations applying the electron localisability approach as well as on experimental results obtained from Raman spectroscopy, Hall effect and electrical resistivity measurements on oriented single crystals. The analysis of the chemical bonding reveals four different covalent interactions leading to the formation of interpenetrating 6<jats:sup>3<\/jats:sup> nets of tin and chains of transition\u2010metal atoms T (T=Mn, Fe or Co) along [001], which are interconnected by three\u2010centre bonds. Polarised Raman measurements on oriented single crystals allowed the determination of the bond strengths, resulting in a bond order of 0.5 within the 6<jats:sup>3<\/jats:sup> nets, while the three\u2010centre interactions show bond orders of up to 1. Measurements show a metal\u2010like temperature dependence of the resistivity. A comparison of the results with the bonding models obtained for the isostructural compounds CuAl<jats:sub>2<\/jats:sub>, TiSb<jats:sub>2<\/jats:sub> and VSb<jats:sub>2<\/jats:sub> reveals the influence of the main\u2010group element on the connectivity pattern.<\/jats:p>","DOI":"10.1002\/chem.201001473","type":"journal-article","created":{"date-parts":[[2010,8,21]],"date-time":"2010-08-21T02:00:17Z","timestamp":1282356017000},"page":"10357-10365","source":"Crossref","is-referenced-by-count":43,"title":["Chemical Bonding in Compounds of the CuAl<sub>2<\/sub> Family: MnSn<sub>2<\/sub>, FeSn<sub>2<\/sub> and CoSn<sub>2<\/sub>"],"prefix":"10.1002","volume":"16","author":[{"given":"Marc","family":"Armbr\u00fcster","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Walter","family":"Schnelle","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raul","family":"Cardoso\u2010Gil","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuri","family":"Grin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2010,8,19]]},"reference":[{"key":"e_1_2_6_1_2","doi-asserted-by":"publisher","DOI":"10.1002\/zaac.19382380213"},{"key":"e_1_2_6_2_2","first-page":"11","volume":"17","author":"Nial O.","year":"1943","journal-title":"Ark. 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