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The adducts of Cu<jats:sup>I<\/jats:sup>, Ag<jats:sup>I<\/jats:sup>, and Au<jats:sup>I<\/jats:sup> ions, stabilized by tricyclohexylphosphine (PCy<jats:sub>3<\/jats:sub>), <jats:italic>N<\/jats:italic>\u20101,3\u2010bis(4\u2010methylphenyl)imidazol\u20102\u2010ylidene (ITol), or 1\u2010(2,6\u2010diisopropylphenyl)\u20103,3,5,5\u2010tetramethylpyrrolidin\u20102\u2010ylidene (CAAC), with [{Cp(CO)<jats:sub>2<\/jats:sub>Mn}<jats:sub>2<\/jats:sub>B]<jats:sup>\u2212<\/jats:sup> were studied spectroscopically, structurally, and computationally. The geometries of the adducts fall into two classes, one symmetric and one asymmetric, each relying on the combined characteristics of both the metal and ligand. The energetic factors proposed as the causes of the structural differences were investigated by ETS\u2010NOCV (extended transition state\u2010natural orbitals for chemical valence) analysis, which showed the final geometry to be controlled by the competition between the tendency of the coinage metal to adopt a higher or lower coordination number and the willingness of the cationic fragment to participate in back\u2010bonding interactions.<\/jats:p>","DOI":"10.1002\/chem.201500788","type":"journal-article","created":{"date-parts":[[2015,7,14]],"date-time":"2015-07-14T20:01:37Z","timestamp":1436904097000},"page":"12347-12356","source":"Crossref","is-referenced-by-count":33,"title":["Organometallic Probe for the Electronics of Base\u2010Stabilized Group\u200511 Metal Cations"],"prefix":"10.1002","volume":"21","author":[{"given":"Holger","family":"Braunschweig","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"William C.","family":"Ewing","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thomas","family":"Kramer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"James D.","family":"Mattock","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alfredo","family":"Vargas","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christine","family":"Werner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2015,7,14]]},"reference":[{"key":"e_1_2_6_1_2","unstructured":"\u00a0"},{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr00029a004"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ccr.2008.03.001"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1039\/b717104h"},{"key":"e_1_2_6_5_2","unstructured":"\u00a0"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr900074m"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr8005153"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr050004s"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ccr.2006.09.004"},{"key":"e_1_2_6_10_2","unstructured":"\u00a0"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ccr.2006.08.019"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1002\/ejic.201300483"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1039\/C2DT32617E"},{"key":"e_1_2_6_14_2","unstructured":"\u00a0"},{"key":"e_1_2_6_15_2","doi-asserted-by":"publisher","DOI":"10.1039\/c2cy20816d"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1055\/s-2007-985577"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.200600961"},{"key":"e_1_2_6_18_2","unstructured":"\u00a0"},{"key":"e_1_2_6_19_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja047284y"},{"key":"e_1_2_6_20_2","doi-asserted-by":"publisher","DOI":"10.1039\/b509958g"},{"key":"e_1_2_6_21_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja061105q"},{"key":"e_1_2_6_22_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo0705014"},{"key":"e_1_2_6_23_2","unstructured":"\u00a0"},{"key":"e_1_2_6_24_2","doi-asserted-by":"publisher","DOI":"10.1039\/b816696j"},{"key":"e_1_2_6_25_2","doi-asserted-by":"publisher","DOI":"10.3762\/bjoc.9.264"},{"key":"e_1_2_6_26_2","doi-asserted-by":"publisher","DOI":"10.1039\/b711132k"},{"key":"e_1_2_6_27_2","doi-asserted-by":"publisher","DOI":"10.1039\/C3CC45518A"},{"key":"e_1_2_6_28_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1521-3773(19980605)37:10<1415::AID-ANIE1415>3.0.CO;2-N"},{"key":"e_1_2_6_28_3","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1521-3757(19980518)110:10<1475::AID-ANGE1475>3.0.CO;2-L"},{"key":"e_1_2_6_29_2","unstructured":"\u00a0"},{"key":"e_1_2_6_30_2","doi-asserted-by":"publisher","DOI":"10.1039\/B610657A"},{"key":"e_1_2_6_31_2","doi-asserted-by":"publisher","DOI":"10.1039\/b914632f"},{"key":"e_1_2_6_32_2","doi-asserted-by":"publisher","DOI":"10.1002\/chem.201103289"},{"key":"e_1_2_6_33_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jorganchem.2010.09.055"},{"key":"e_1_2_6_34_2","unstructured":"\u00a0"},{"key":"e_1_2_6_35_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1229506"},{"key":"e_1_2_6_36_2","doi-asserted-by":"publisher","DOI":"10.1021\/cs500326e"},{"key":"e_1_2_6_37_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.0710500105"},{"key":"e_1_2_6_38_2","unstructured":"\u00a0"},{"key":"e_1_2_6_39_2","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201204449"},{"key":"e_1_2_6_39_3","doi-asserted-by":"publisher","DOI":"10.1002\/ange.201204449"},{"key":"e_1_2_6_40_2","doi-asserted-by":"crossref","unstructured":"P. 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