2026-10-13T09:08:14Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33964934 2026-09-22T12:43:07Z category_1 category_4 category_14 category_21 category_873 category_931 portal_63 item_type_3 month_year_09_2026

Flash Communication: Copper Complexes Supported by Macrocyclic N‑Heterocyclic Carbene Ligands with Ether or Secondary Amine Donors Matthew O. Ariwoola (25089938) Paul Bekai (25089941) Soumyadip Sharangi (21022134) Brenna Lawrence (25089944) Kaden Moracco (25089947) Yunping Zhoujin (11587796) Mark D. Smith (1406332) Hans-Conrad zur Loye (7340348) Heui Beom Lee (1637179) Biophysics Biochemistry Molecular Biology Biotechnology Chemical Sciences not elsewhere classified Information Systems not elsewhere classified variable coordination environments type ligand frameworks acac )< sub 2 </ sub secondary amine donor copper complexes supported complexes characterized amine complex stable compounds ray diffraction flash communication extensively studied cyclic voltammetry crystal x conventional methods 330 mv Metal complexes featuring secondary amine donors have been extensively studied in the context of hydrogen-bonding or metal–ligand cooperative interactions. In this regard, pincer-type ligand frameworks have been described, but macrocyclic variants remain rare. Herein, we describe the synthesis of macrocyclic carbene ligand frameworks featuring a carbazolide backbone and an ether or secondary amine donor. While the ether was synthesized through conventional methods, the amine variant required microwave heating. Carbazolide-bis(imidazolium) pro-ligands were isolated as air-stable compounds. Metalation with Cu(acac)₂ led to the formation of square-planar Cu(II) complexes characterized by single-crystal X-ray diffraction and cyclic voltammetry. A significantly more cathodic Cu(I)/Cu(II) wave by 330 mV was observed for the amine complex. Combined, the results highlight new macrocyclic carbene platforms with variable coordination environments. 2026-09-22T00:00:00Z Dataset Dataset 10.1021/acs.organomet.6c00208.s002 https://figshare.com/articles/dataset/Flash_Communication_Copper_Complexes_Supported_by_Macrocyclic_N_Heterocyclic_Carbene_Ligands_with_Ether_or_Secondary_Amine_Donors/33964934 CC BY-NC 4.0