Iron carbonyl complexes bearing phenazine and acridine ligands: X-ray structures of Fe(CO)₃(η⁴-C₁₂H₈N₂), Fe(CO)₂{P(OMe)₃}(η⁴-C₁₂H₈N₂), Fe(CO)₂(PPh₃) (η⁴-C₁₃H₉N), and Fe(CO)₂(κ¹-dppm) (η⁴-C₁₂H₈N₂)

TY - JOUR

T1 - Iron carbonyl complexes bearing phenazine and acridine ligands

T2 - X-ray structures of Fe(CO)3(η4-C12H8N2), Fe(CO)2{P(OMe)3}(η4-C12H8N2), Fe(CO)2(PPh3) (η4-C13H9N), and Fe(CO)2(κ1-dppm) (η4-C12H8N2)

AU - Chowdhury, Md Arshad H

AU - Rahman, Md Saifur

AU - Islam, Md Rakibul

AU - Rajbangshi, Subas

AU - Ghosh, Shishir

AU - Hogarth, Graeme

AU - Tocher, Derek A.

AU - Yang, Li

AU - Richmond, Michael G.

AU - Kabir, Shariff E.

PY - 2016/3/1

Y1 - 2016/3/1

N2 - Reactions of Fe3(CO)12 with the heterocycles phenazine and acridine in refluxing benzene afforded the mononuclear complexes Fe(CO)3(η4-C12H8N2) (1a) and Fe(CO)3(η4-C13H9N) (1b), respectively. Treatment of 1a with P(OMe)3 and PPh3 in the presence of Me3NO at room temperature yielded the carbonyl substitution products Fe(CO)2{P(OMe)3}(η4-C12H8N2) (2a) and Fe(CO)2(PPh3) (η4-C12H8N2) (3a), respectively. Similar reactions of 1b yielded Fe(CO)2{P(OMe)3}(η4-C13H9N) (2b) and Fe(CO)2(PPh3) (η4-C13H9N) (3b). Treatment of 1a with the diphosphines dppm and dppf under similar conditions afforded the mononuclear compounds Fe(CO)2(κ1-dppm) (η4-C12H8N2) (4a) and Fe(CO)2(κ1-dppf) (η4-C12H8N2) (4b). Compounds 1a, 2a, 3b, and 4a have been structurally characterized by X-ray crystallography. The ancillary phenazine and acridine ligands in these products adopt an η4-coordination mode by using only the peripheral carbon atoms in one of the carbocyclic rings. Given the rarity of this coordination mode in metal carbonyl complexes, we have performed electronic structure calculations on 1a, and these data are discussed relative to the solid-state structure.

AB - Reactions of Fe3(CO)12 with the heterocycles phenazine and acridine in refluxing benzene afforded the mononuclear complexes Fe(CO)3(η4-C12H8N2) (1a) and Fe(CO)3(η4-C13H9N) (1b), respectively. Treatment of 1a with P(OMe)3 and PPh3 in the presence of Me3NO at room temperature yielded the carbonyl substitution products Fe(CO)2{P(OMe)3}(η4-C12H8N2) (2a) and Fe(CO)2(PPh3) (η4-C12H8N2) (3a), respectively. Similar reactions of 1b yielded Fe(CO)2{P(OMe)3}(η4-C13H9N) (2b) and Fe(CO)2(PPh3) (η4-C13H9N) (3b). Treatment of 1a with the diphosphines dppm and dppf under similar conditions afforded the mononuclear compounds Fe(CO)2(κ1-dppm) (η4-C12H8N2) (4a) and Fe(CO)2(κ1-dppf) (η4-C12H8N2) (4b). Compounds 1a, 2a, 3b, and 4a have been structurally characterized by X-ray crystallography. The ancillary phenazine and acridine ligands in these products adopt an η4-coordination mode by using only the peripheral carbon atoms in one of the carbocyclic rings. Given the rarity of this coordination mode in metal carbonyl complexes, we have performed electronic structure calculations on 1a, and these data are discussed relative to the solid-state structure.

KW - Acridine

KW - DFT calculations

KW - Iron carbonyl

KW - Phenazine

KW - Phosphines

KW - X-ray structure

UR - http://www.scopus.com/inward/record.url?scp=84954511102&partnerID=8YFLogxK

U2 - 10.1016/j.jorganchem.2015.12.023

DO - 10.1016/j.jorganchem.2015.12.023

M3 - Article

AN - SCOPUS:84954511102

SN - 0022-328X

VL - 805

SP - 34

EP - 41

JO - JOURNAL OF ORGANOMETALLIC CHEMISTRY

JF - JOURNAL OF ORGANOMETALLIC CHEMISTRY

ER -