{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T20:02:33Z","timestamp":1791662553929,"version":"4.3.4"},"reference-count":38,"publisher":"Wiley","issue":"28","license":[{"start":{"date-parts":[[2025,5,22]],"date-time":"2025-05-22T00:00:00Z","timestamp":1747872000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["HA 3218\/12\u20131"],"award-info":[{"award-number":["HA 3218\/12\u20131"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Angew Chem Int Ed"],"published-print":{"date-parts":[[2025,7,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    DFT calculations on \u03b2\u2010diketiminate (BDI) complexes with the full series of alkaline\u2010earth (Ae) metals show that (BDI)AeAe(BDI) complexes of the heavier Ae metals (Ca, Sr, Ba) have long weak Ae\u2500Ae bonds that are prone to homolytic bond cleavage. However, isolation of (BDI)Sr(\u03bc\u2010N\n                    <jats:sub>2<\/jats:sub>\n                    )Sr(BDI) with a side\u2010on bridging N\n                    <jats:sub>2<\/jats:sub>\n                    <jats:sup>2\u2212<\/jats:sup>\n                    dianion should thermodynamically be feasible. Attempts to stabilize such a complex with the super bulky BDI* ligand failed (BDI*\u00a0=\u00a0HC[(Me)C\u00a0=\u00a0N\u2010DIPeP]\n                    <jats:sub>2<\/jats:sub>\n                    , DIPeP\u00a0=\u00a02,6\u2010Et\n                    <jats:sub>2<\/jats:sub>\n                    CH\u2010phenyl). First, N\n                    <jats:sub>2<\/jats:sub>\n                    fixation with a Sr complex was enabled by a heterobimetallic approach. Reduction of (\n                    <jats:sup>DIPeP<\/jats:sup>\n                    NN)Sr with potassium gave (\n                    <jats:sup>DIPeP<\/jats:sup>\n                    NN)\n                    <jats:sub>2<\/jats:sub>\n                    Sr\n                    <jats:sub>2<\/jats:sub>\n                    K\n                    <jats:sub>2<\/jats:sub>\n                    (N\n                    <jats:sub>2<\/jats:sub>\n                    ) (\n                    <jats:bold>6<\/jats:bold>\n                    \u2010Sr);\n                    <jats:sup>DIPeP<\/jats:sup>\n                    NN\u00a0=\u00a0\n                    <jats:sup>DIPeP<\/jats:sup>\n                    N\u2010Si(Me)\n                    <jats:sub>2<\/jats:sub>\n                    CH\n                    <jats:sub>2<\/jats:sub>\n                    CH\n                    <jats:sub>2<\/jats:sub>\n                    Si(Me)\n                    <jats:sub>2<\/jats:sub>\n                    \u2010N\n                    <jats:sup>DIPeP<\/jats:sup>\n                    . A similar Ca product was also isolated (\n                    <jats:bold>6<\/jats:bold>\n                    \u2010Ca). Crystal structures reveal a N\n                    <jats:sub>2<\/jats:sub>\n                    <jats:sup>2\u2212<\/jats:sup>\n                    anion with side\u2010on bonding to Ae\n                    <jats:sup>2+<\/jats:sup>\n                    and end\u2010on coordination to K\n                    <jats:sup>+<\/jats:sup>\n                    . DFT calculations and Atoms\u2010In\u2010Molecules analyses show mainly ionic bonding. Both\n                    <jats:bold>6<\/jats:bold>\n                    \u2010Ae complexes are synthons for hitherto unknown (BDI*)AeAe(BDI*) (Ae\u00a0=\u00a0Ca, Sr) and react by releasing N\n                    <jats:sub>2<\/jats:sub>\n                    and two electrons. Although surprisingly stable in benzene, the reduction of I\n                    <jats:sub>2<\/jats:sub>\n                    and H\n                    <jats:sub>2<\/jats:sub>\n                    is facile. Fast reaction with Teflon led to formation of crystalline [(\n                    <jats:sup>DIPeP<\/jats:sup>\n                    NN)SrKF]\n                    <jats:sub>2<\/jats:sub>\n                    (\n                    <jats:bold>7<\/jats:bold>\n                    ), which is labile and decomposed to KF and (\n                    <jats:sup>DIPeP<\/jats:sup>\n                    NN)Sr. Latter reactivity underscores potential use of\n                    <jats:bold>6<\/jats:bold>\n                    \u2010Ae complexes as very strong, hydrocarbon\u2010soluble reducing agents.\n                  <\/jats:p>","DOI":"10.1002\/anie.202506989","type":"journal-article","created":{"date-parts":[[2025,5,2]],"date-time":"2025-05-02T12:41:28Z","timestamp":1746189688000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Dinitrogen Activation with Low\u2010Valent Strontium"],"prefix":"10.1002","volume":"64","author":[{"given":"Michael","family":"Morasch","sequence":"first","affiliation":[{"name":"Inorganic and Organometallic Chemistry Universit\u00e4t Erlangen\u2010N\u00fcrnberg  Egerlandstrasse 1 91058 Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Timothy","family":"Vilpas","sequence":"additional","affiliation":[{"name":"Inorganic and Organometallic Chemistry Universit\u00e4t Erlangen\u2010N\u00fcrnberg  Egerlandstrasse 1 91058 Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Neha","family":"Patel","sequence":"additional","affiliation":[{"name":"Inorganic and Organometallic Chemistry Universit\u00e4t Erlangen\u2010N\u00fcrnberg  Egerlandstrasse 1 91058 Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Johannes","family":"Maurer","sequence":"additional","affiliation":[{"name":"Inorganic and Organometallic Chemistry Universit\u00e4t Erlangen\u2010N\u00fcrnberg  Egerlandstrasse 1 91058 Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stefan","family":"Thum","sequence":"additional","affiliation":[{"name":"Inorganic and Organometallic Chemistry Universit\u00e4t Erlangen\u2010N\u00fcrnberg  Egerlandstrasse 1 91058 Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcel A.","family":"Schmidt","sequence":"additional","affiliation":[{"name":"Inorganic and Organometallic Chemistry Universit\u00e4t Erlangen\u2010N\u00fcrnberg  Egerlandstrasse 1 91058 Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jens","family":"Langer","sequence":"additional","affiliation":[{"name":"Inorganic and Organometallic Chemistry Universit\u00e4t Erlangen\u2010N\u00fcrnberg  Egerlandstrasse 1 91058 Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3997-1440","authenticated-orcid":false,"given":"Sjoerd","family":"Harder","sequence":"additional","affiliation":[{"name":"Inorganic and Organometallic Chemistry Universit\u00e4t Erlangen\u2010N\u00fcrnberg  Egerlandstrasse 1 91058 Erlangen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,5,22]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chempr.2018.10.010"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0010-8545(00)00264-2"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.checat.2024.100964"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.9b00638"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.9b00705"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1139\/v05-014"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2CS00041E"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1002\/chem.202104123"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aaq1684"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202209102"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.abf2374"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202308347"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1039\/D2CC04841H"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1002\/ejic.202300421"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202212463"},{"key":"e_1_2_8_16_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41570-023-00548-0"},{"key":"e_1_2_8_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.theochem.2008.10.004"},{"key":"e_1_2_8_18_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.organomet.3c00157"},{"key":"e_1_2_8_19_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.adh4419"},{"key":"e_1_2_8_20_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41570-017-0059"},{"key":"e_1_2_8_21_1","doi-asserted-by":"publisher","DOI":"10.1038\/s44160-022-00077-6"},{"key":"e_1_2_8_22_1","doi-asserted-by":"publisher","DOI":"10.1039\/D1CC04147A"},{"key":"e_1_2_8_23_1","doi-asserted-by":"publisher","DOI":"10.1039\/D3SC00909B"},{"key":"e_1_2_8_24_1","doi-asserted-by":"publisher","DOI":"10.1039\/D3DT00945A"},{"key":"e_1_2_8_25_1","doi-asserted-by":"publisher","DOI":"10.1021\/jp109547w"},{"key":"e_1_2_8_26_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.organomet.9b00211"},{"key":"e_1_2_8_27_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.organomet.8b00803"},{"key":"e_1_2_8_28_1","doi-asserted-by":"publisher","DOI":"10.1039\/b101576l"},{"key":"e_1_2_8_29_1","doi-asserted-by":"publisher","DOI":"10.1002\/chem.202400662"},{"key":"e_1_2_8_30_1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.201914986"},{"key":"e_1_2_8_31_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41557-024-01524-x"},{"key":"e_1_2_8_32_1","doi-asserted-by":"publisher","DOI":"10.1039\/D5DT00044K"},{"key":"e_1_2_8_33_1","doi-asserted-by":"publisher","DOI":"10.1039\/D4CC02594F"},{"key":"e_1_2_8_34_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.inorgchem.4c00207"},{"key":"e_1_2_8_35_1","doi-asserted-by":"publisher","DOI":"10.1107\/S0567739476001551"},{"key":"e_1_2_8_36_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.3c00255"},{"key":"e_1_2_8_37_1","doi-asserted-by":"publisher","DOI":"10.1002\/chem.202401005"},{"key":"e_1_2_8_38_1","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.3c02526"}],"container-title":["Angewandte 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