In this contribution we report the synthesis of the novel unsymmetrical ferrocene‐based pincer‐type proligand η5‐CpFeη5‐C5H2‐1‐Br‐2‐PPh2‐5‐CH2NMe2 (1). Its reactivity is demonstrated by isolation of related organotin derivatives η5‐CpFeη5‐C5H2‐1‐SnR3‐2‐PPh2‐5‐CH2NMe2 (3, R = Ph; 4, R = Me). The reactions of compounds 3 and 4 with H2O2 and elemental sulfur gave the corresponding ferrocenylphosphane oxide (5) and the sulfides (6, 7), respectively. Most remarkably, an unprecedented reaction of the organotin derivative 3 with elemental iodine was observed, providing the ammonium salt [η5‐CpFeη5‐C5H2‐1‐SnPh2I‐2‐P(O)Ph2‐5‐CH2NHMe2]I (8). The compounds are characterized by elemental analyses, 1H, 13C, 31P, 119Sn NMR spectroscopy, electrospray ionization mass spectrometry, and single‐crystal X‐ray diffraction analyses (3–8). Also reported are the solid‐state structures of the hydrolysis products [η5‐CpFeη5‐C5H2‐1‐SnPh2(OH)‐2‐P(O)Ph2‐5‐CH2NHMe2]·0.5H2O (9a) and [η5‐CpFeη5‐C5H2‐1‐SnPh(OH)‐2‐P(O)Ph2‐5‐CH2NMe2]2[I3]2 (9b) that were isolated by serendipity.
Zusammenfassung: DieNutzungvon fossilen undregenerativen Rohstoffen zurEnergiegewinnung undderen Beitragz um Kohlenstoffkreislauf iste in komplexesT hema,w elches unterschiedliche (Schüler:innen-)Schwierigkeitenm it sich bringt.D arum iste su msow ichtiger,b ei derP lanung einess olchen Unterrichtsd iese Lernhürden zu berücksichtigen. Um Studierendedafürzuprofessionalisieren,bietetsichdie Arbeit mitVideosvon realem Unterricht an.D aherw urdenU nterrichtsvideos erstellt undd eren Einsatzi ne iner Lehrveranstaltung beforscht. DieV ideosz eigenS chüler:innenb ei derE rstellungv on Kohlenstoffkreisläufen undo ffenbaren (Schüler:innen-)Schwierigkeiteni mP rozess derA ufgabenbearbeitung.D er Beitragf ührtl iteraturbekannte Lernhürden zumThema aufund zeigtanhand derausgewertetenErgebnisseder Videoanalysen, welche (Schüler:innen-)Schwierigkeiten Studierendeanhandder entwickelten Unterrichtsvideosidentifizierenkçnnen. Stichworte: Unterrichtsvideos•Schüler:innenschwierigkeiten •Lernhürden •Stoffkreisläufe"A ftera ll,t he burntw oodn ol ongerp erformsp hotosynthesis" -a nalyzing (students)d ifficulties in drawing up carbon cycles with thehelpofvideoscases Abstract: Thee nergetic useo ff ossila nd regenerative resourcesa nd theirc ontributiont ot he carbon cyclei s ac omplex topict hatc ausesd ifferent (students)d ifficulties. Therefore, it is especially importantt oc onsider thesedifficultieswhenplanning such lessons. Asuitableapproachtosensitizefutureteacherswithinthisregard is workingw ithv ideo caseso fr eall essons.H ence,l essonsw erer ecordeda nd theiru se in au niversityl ecture wasa nalyzed. Thesevideosshowstudentsc reatingc arbon cycles andr eveal(students)d ifficulties in thep rocess of completing thetask. Thearticle reportscommon documented/researchedbarriersinlearningabout the topic. Further, it showsw hich difficultiest he future teachers were able to identify by meanso fa nalyzing the videocases.
The reaction of sodium chloride with 2-[bis(2-hydroxyethyl)amino]ethan-1-ol results in the formation of the title salt {[Na{N(CH2CH2OH)3}]Cl} n . The polymeric structure is characterized by a sodium cation coordinated by one nitrogen and five oxygen atoms in a distorted octahedral environment. The resulting one-dimensional {—O—Na—O—Na—O}— coordination polymer extends parallel to [010] and is connected through the chloride counter-anion via O—H...Cl hydrogen bonding, giving rise to a two-dimensional supramolecular structure parallel to (001).
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