Tuning the coordination sphere of octahedral Dy(iii) complexes with silanolate/stannanolate ligands: synthesis, structures and slow relaxation of the magnetization. Issue 47 (9th November 2021)

• Record Type: Journal Article
• Authors: Long, Jérôme; Tolpygin, Aleksei O.; Cherkasov, Anton V.; Nelyubina, Yulia V.; Guari, Yannick; Larionova, Joulia; Trifonov, Alexander A.
• Is Part Of: CrystEngComm. Volume 23:Issue 47(2021)
• Page Start: 8351
• Page End: 8359
• Publication Date: 2021-11-09
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d1ce01266e
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : This study reports four SMMs based on silanolate or stannanolate ligands cis -[Dy(OSiPh3 )2 (THF)4 ][BPh4 ]·THF·C6 H6 (1 ), cis -[Dy(OSnPh3 )2 (THF)4 ][BPh4 ]·THF·C6 H6· C6 H14 (2 ), fac -[Dy(OSiPh3 )3 (THF)3 ]·THF (3 ) and fac -[Dy(OSiPh3 )3 (bipy)(THF)]·THF (4 ). Abstract : We report the synthesis, crystal structures and magnetic investigations of four octahedral dysprosium complexes based on silanolate or stannanolate ligands of respective formula cis -[Dy(OSiPh3 )2 (THF)4 ][BPh4 ]·THF·C6 H6 (1 ), cis -[Dy(OSnPh3 )2 (THF)4 ][BPh4 ]·THF·C6 H6 ·C6 H14 (2 ), fac -[Dy(OSiPh3 )3 (THF)3 ]·THF (3 ) and fac -[Dy(OSiPh3 )3 (bipy)(THF)]·THF (4 ) (where THF = tetrahydrofuran, Ph = phenyl, bipy = 2, 2′-bipyridine). Whereas complexes 1–3 exhibit a field-induced slow relaxation of the magnetization, 4 is a zero-field single-molecule magnet, which could be rationalized by the introduction of the bidentate bipy ligand providing a more important linearity of the (Si)O–Dy–O(Si) angle through distortion of the coordination sphere.