Bulky 1,1’-Ferrocenyl Ligands Featuring Diazaphospholene or Dioxaphosphepine Donor Fragments: Catalytic Screening in Nickel-Catalyzed C-N Cross-Coupling

1,1 '-Ferrocenyl ligands featuring either bulky dioxaphosphepine (L1) or diazaphospholene (L2) donor moieties have been prepared, crystallographically characterized, and tested in representative nickel-catalyzed C-N cross-coupling reactions. Ligand L1 proved competent in cross-couplings involving primary/secondary alkylamine or indole nucleophiles with (hetero)aryl chlorides, with the catalytic performance of rac and meso-L1 differing in the case of some substrate pairings. Conversely, L2 proved ineffective under analogous conditions.