Correction: Heteroleptic iron(II) complexes of chiral 2,6-bis(oxazolin-2-yl)-pyridine (PyBox) and 2,6-bis(thiazolin-2-yl)pyridine ligands - the interplay of two different ligands on the metal ion spin state.

Correction for 'Heteroleptic iron(II) complexes of chiral 2,6-bis(oxazolin-2-yl)-pyridine (PyBox) and 2,6-bis(thiazolin-2-yl)pyridine ligands - the interplay of two different ligands on the metal ion spin state' by Namrah Shahid , , 2022, , 4262-4274, DOI: 10.1039/d2dt00393g.

Heteroleptic iron(II) complexes of chiral 2,6-bis(oxazolin-2-yl)-pyridine (PyBox) and 2,6-bis(thiazolin-2-yl)pyridine ligands - the interplay of two different ligands on the metal ion spin sate.

Complexation of Fe[ClO]·6HO by 1 equiv. 2,6-bis((4)-4-phenyl-4,5-dihydrooxazol-2-yl)pyridine (()-LPh) and 2,6-bis((4)-4-phenyl-4,5-dihydrothiazol-2-yl)pyridine (()-LPh) cleanly affords [Fe(()-LPh)(()-LPh)][ClO]; [Fe(()-LiPr)(()-LiPr)][ClO] (LiPr = 2,6-bis(4-isopropyl-4,5-dihydrooxazol-2-yl)pyridine; LiPr = 2,6-bis(4-isopropyl-4,5-dihydrothiazol-2-yl)pyridine) was prepared by a similar route. The compounds exhibit thermal spin-crossover in solution, at temperatures midway between the corresponding [Fe(()-LR)(()-LR)][ClO] and [Fe(()-LR)(()-LR)][ClO] (R = Ph or iPr) species.

Spin-States of Diastereomeric Iron(II) Complexes of 2,6-Bis(thiazolin-2-yl)pyridine (ThioPyBox) Ligands and a Comparison with the Corresponding PyBox Derivatives.

This report investigates homoleptic iron(II) complexes of thiazolinyl analogues of chiral PyBox tridentate ligands: 2,6-(4-phenyl-4,5-dihydrothiazol-2-yl)pyridine (Ph), 2,6-(4-propyl-4,5-dihydrothiazol-2-yl)pyridine (Pr), and 2,6-(4--butyl-4,5-dihydrothiazol-2-yl)pyridine (-Bu). Crystallographic data imply the larger and more flexible thiazolinyl rings reduce steric clashes between the R substituents in homochiral [Fe(()-R)] or [Fe(()-R)] (R = Ph, Pr, or -Bu), compared to their PyBox (R) analogues. Conversely, the larger heterocyclic S atoms are in close contact with the R substituents in heterochiral [Fe(()-Ph)(()-Ph)], giving it a more sterically hindered ligand environment than that in [Fe(()-Ph)(()-Ph)] (Ph = 2,6-(4-phenyl-4,5-dihydrooxazol-2-yl)pyridine).

Spin States of Homochiral and Heterochiral Isomers of [Fe(PyBox) ] Derivatives.

The following iron(II) complexes of 2,6-bis(oxazolinyl)pyridine (PyBox; L ) derivatives are reported: [Fe(L ) ][ClO ] (1); [Fe((R)-L ) ][ClO ] ((R)-2; L =2,6-bis{4-methyloxazolinyl}pyridine); [Fe((R)-L ) ][ClO ] ((R)-3) and [Fe((R)-L )((S)-L )][ClO ] ((RS)-3; L =2,6-bis{4-phenyloxazolinyl}pyridine); and [Fe((R)-L ) ][ClO ] ((R)-4) and [Fe((R)-L )((S)-L )][ClO ] ((RS)-4; L =2,6-bis{4-isopropyloxazolinyl}pyridine). Solid (R)-3⋅MeNO exhibits an unusual very gradual, but discontinuous thermal spin-crossover with an approximate T1/2 of 350 K. The discontinuity around 240 K lies well below T1/2 , and is unconnected to a crystallographic phase change occurring at 170 K.