{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T22:29:35Z","timestamp":1777588175115,"version":"3.51.4"},"reference-count":58,"publisher":"Wiley","issue":"24","license":[{"start":{"date-parts":[[2008,5,5]],"date-time":"2008-05-05T00:00:00Z","timestamp":1209945600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Angew Chem Int Ed"],"published-print":{"date-parts":[[2008,6,2]]},"DOI":"10.1002\/anie.200800813","type":"journal-article","created":{"date-parts":[[2008,5,5]],"date-time":"2008-05-05T12:54:04Z","timestamp":1209992044000},"page":"4584-4587","source":"Crossref","is-referenced-by-count":63,"title":["The Homoleptic Sandwich Anion [Co(P<sub>2<\/sub>C<sub>2<\/sub><i>t<\/i>Bu<sub>2<\/sub>)<sub>2<\/sub>]<sup>\u2212<\/sup>: A Versatile Building Block for Phosphaorganometallic Chemistry"],"prefix":"10.1002","volume":"47","author":[{"given":"Robert","family":"Wolf","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andreas\u2005W.","family":"Ehlers","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.\u2005Chris","family":"Slootweg","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martin","family":"Lutz","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dietrich","family":"Gudat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael","family":"Hunger","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anthony\u2005L.","family":"Spek","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koop","family":"Lammertsma","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2008,5,27]]},"reference":[{"key":"e_1_2_3_1_2","unstructured":"\u00a0"},{"key":"e_1_2_3_2_2","doi-asserted-by":"publisher","DOI":"10.1515\/znb-1981-0105"},{"key":"e_1_2_3_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr00099a007"},{"key":"e_1_2_3_4_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr00029a010"},{"key":"e_1_2_3_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/0010-8545(95)90224-4"},{"key":"e_1_2_3_6_2","volume-title":"Multiple Bonds and Low Coordination Phosphorus Chemistry","author":"Regitz M.","year":"1990"},{"key":"e_1_2_3_7_2","volume-title":"Phosphorus: The Carbon Copy","author":"Dillon K. 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The structures were solved by direct methods (SHELXS\u201097)[20]and refined with SHELXL\u201097[20]againstF\u20092of all reflections. Non\u2010hydrogen atoms were refined with anisotropic displacement parameters. Hydrogen atoms were introduced in calculated positions and refined with a riding model. Geometry calculations and checking for higher symmetry was performed with the PLATON program.[21]1: [C20H40KO8](C20H36CoP4) Mw=906.92 red block 0.48\u00d70.30\u00d70.21\u2005mm3 monoclinic P21\/c(no. 14) a=10.2813(9) b=23.7637(2) c=19.9146(9)\u2005\u00c5 \u03b2=92.253(2)\u00b0 V=4861.8(5)\u2005\u00c53 Z=4 Dx=1.239\u2005g\u2009cm\u22123 \u03bc=0.614\u2005mm\u22121. 119\u2009571 Reflections were measured. An absorption correction based on multiple measured reflections was applied (0.53\u20130.88 correction range). 11\u2009177 Reflections were unique (Rint=0.048). 521 Parameters were refined with 23 restraints.R1\/wR2 [I>2\u03c3(I)]: 0.0364\/0.0800.R1\/wR2 (all refl.): 0.0609\/0.0909.S=1.029. Residual electron density between \u22120.66 and 0.76\u2005e\u2009\u00c53.2: see theSupporting Information.3: C21H39CoP4 Mw=474.33 red needle 0.54\u00d70.20\u00d70.20\u2005mm3 monoclinic P21\/c(no. 14) a=11.4450(5) b=10.7987(2) c=20.1511(8)\u2005\u00c5 \u03b2=92.230(1)\u00b0 V=2488.61(18)\u2005\u00c53 Z=4 Dx=1.266\u2005g\u2009cm\u22123 \u03bc=0.951\u2005mm\u22121. 31\u2009341 Reflections were measured. The crystal appeared to be non\u2010merohedrally twinned with a twofold rotation about the crystallographica\u2005axis as twin operation. This twin operation was taken into account during intensity integration with EvalCCD.[22]The program TWINABS[23]was used to make an absorption correction based on multiple measured reflections (0.63\u20130.83 correction range) and merging of the twinned data. 5802 Reflections were unique (Rint=0.031). An HKLF5 refinement[24]performed with 249 parameters and no restraints resulted in a twin fraction of 0.3378(11).R1\/wR2 [I>2\u03c3(I)]: 0.0371\/0.1069.R1\/wR2 (all refl.): 0.0469\/0.1137.S=1.091. Residual electron density between \u22120.31 and 0.48\u2005e\u2009\u00c53.4: C32H46CoP5 Mw=644.47 red block 0.60\u00d70.42\u00d70.30\u2005mm3 triclinic P$\\bar 1$(no. 2) a=11.61516(5) b=12.1518(5) c=12.7100(5)\u2005\u00c5 \u03b1=68.561(2)\u00b0 \u03b2=79.627(2)\u00b0 \u03b3=74.203(3)\u00b0 V=1600.23(11)\u2005\u00c53 Z=2 Dx=1.338\u2005g\u2009cm\u22123 \u03bc=0.807\u2005mm\u22121. 26\u2009243 Reflections were measured. An absorption correction based on multiple measured reflections was applied (0.61\u20130.78 correction range). 7358 Reflections were unique (Rint=0.020). 355 Parameters were refined with no restraints.R1\/wR2 [I>2\u03c3(I)]: 0.0244\/0.0572.R1\/wR2 (all refl.): 0.0330\/0.0604.S=1.031. Residual electron density between \u22120.23 and 0.36\u2005e\u2009\u00c53."},{"key":"e_1_2_3_25_3","unstructured":"CCDC\u2010676286 (1) \u2010676287 (2) \u2010676288 (3) and \u2010676289 (4) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre viawww.ccdc.cam.ac.uk\/data_request\/cif."},{"key":"e_1_2_3_26_2","unstructured":"\u00a0"},{"key":"e_1_2_3_27_2","doi-asserted-by":"publisher","DOI":"10.1002\/cber.19881210409"},{"key":"e_1_2_3_28_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.19860980719"},{"key":"e_1_2_3_28_3","doi-asserted-by":"publisher","DOI":"10.1002\/anie.198606441"},{"key":"e_1_2_3_29_2","doi-asserted-by":"publisher","DOI":"10.1039\/C39860000737"},{"key":"e_1_2_3_30_2","doi-asserted-by":"publisher","DOI":"10.1039\/C39900001541"},{"key":"e_1_2_3_31_2","unstructured":"The deuterated compound [Co(P2C2tBu2)2D] (D\u20102) was prepared for comparison and found to display spectroscopic properties identical to those of H\u20102; see theSupporting Informationfor details."},{"key":"e_1_2_3_32_2","unstructured":"Geometry optimizations and frequency calculations were performed with the Gaussian\u200503 suite of programs (Gaussian 03 Revision C.02 M.\u2005J. Frisch et\u2005al. Gaussian Inc. Wallingford CT 2004) using the exchange\u2013correlation potential PBE ("},{"key":"e_1_2_3_32_3","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.77.3865"},{"key":"e_1_2_3_32_4","doi-asserted-by":"publisher","DOI":"10.1016\/0009-2614(82)80012-2"},{"key":"e_1_2_3_32_5","unstructured":"see theSupporting Informationfor details."},{"key":"e_1_2_3_33_2","unstructured":"This assumption is supported by the calculated1H and31P\u2005NMR chemical shifts of2\u2009a:\u03b4(1H)=\u22122.4 (CoH) 0.9 (tBu) 1.4\u2005ppm (tBu);\u03b4(31P)=\u2212179 32 and 123\u2005ppm. These values are in good agreement with those observed experimentally at \u221280\u2009\u00b0C. The hydrogen atom interacting with cobalt displays a characteristic high\u2010field shift while the most shielded signal in the31P\u2005NMR spectrum is assigned to the protonated phosphorus atom."},{"key":"e_1_2_3_34_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.200600950"},{"key":"e_1_2_3_34_3","doi-asserted-by":"publisher","DOI":"10.1002\/anie.200600950"},{"key":"e_1_2_3_35_2","doi-asserted-by":"publisher","DOI":"10.1039\/a905240b"},{"key":"e_1_2_3_36_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.jorganchem.2007.11.062"},{"key":"e_1_2_3_37_2","unstructured":"For related triphosphacyclopentadiene complexes see:"},{"key":"e_1_2_3_38_2","doi-asserted-by":"publisher","DOI":"10.1039\/c39950001661"},{"key":"e_1_2_3_39_2","doi-asserted-by":"publisher","DOI":"10.1039\/cc9960002751"},{"key":"e_1_2_3_40_2","doi-asserted-by":"publisher","DOI":"10.1039\/a701412k"},{"key":"e_1_2_3_41_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1098-1071(1998)9:1<1::AID-HC1>3.0.CO;2-H"},{"key":"e_1_2_3_42_2","unstructured":"Our assignment is supported by the calculated31P\u2005NMR chemical shifts of4:\u03b4(31P)=\u221261 (P3) +45 (P1) +51 (P4) +54 (P2) +67\u2005ppm (P5); see theSupporting Informationfor details."},{"key":"e_1_2_3_43_2","doi-asserted-by":"publisher","DOI":"10.1107\/S0108767307043930"},{"key":"e_1_2_3_44_2","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889802022112"},{"key":"e_1_2_3_45_2","doi-asserted-by":"publisher","DOI":"10.1107\/S0021889802022628"},{"key":"e_1_2_3_46_2","unstructured":"G.\u2005M. Sheldrick Twinabs\u2010V1.05.University of G\u00f6ttingen Germany 2005."},{"key":"e_1_2_3_47_2","doi-asserted-by":"publisher","DOI":"10.1107\/S0108768197018454"}],"container-title":["Angewandte Chemie International Edition"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fanie.200800813","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/anie.200800813","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,16]],"date-time":"2023-10-16T17:22:15Z","timestamp":1697476935000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/anie.200800813"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2008,5,27]]},"references-count":58,"journal-issue":{"issue":"24","published-print":{"date-parts":[[2008,6,2]]}},"alternative-id":["10.1002\/anie.200800813"],"URL":"https:\/\/doi.org\/10.1002\/anie.200800813","archive":["Portico"],"relation":{},"ISSN":["1433-7851","1521-3773"],"issn-type":[{"value":"1433-7851","type":"print"},{"value":"1521-3773","type":"electronic"}],"subject":[],"published":{"date-parts":[[2008,5,27]]}}}