Cortijo Montes, MiguelValentín-Pérez, ÁngelaRouzières, MathieuClérac, RodolpheRosa, PatrickHillard, Elizabeth A.2023-06-172023-06-172020-06-032073-435210.3390/cryst10060472https://hdl.handle.net/20.500.14352/8241Octahedral tris(ethylenediamine) coordination complexes demonstrate helicoidal chirality, due to the arrangement of the ligands around the metal core. The enantiomers of the nitrate salts [Ni(en)3](NO3)2 and [Zn(en)3](NO3)2 spontaneously resolve to form a mixture of conglomerate crystals, which present a reversible phase transition from space group P6322 to enantiomorphic P6522 or P6122, with the latter depending on the handedness of the enantiomer. We report here the synthesis and characterization of [Mn(en)3](NO3)2 and [Co(en)3](NO3)2, which are isostructural to the Zn(II) and Ni(II) derivatives. The Mn(II) analogue undergoes the same phase transition centered at 150(2) K, as determined by single-crystal X-ray diffraction, Raman spectroscopy, and differential scanning calorimetry. The Co(II) derivative does not demonstrate a phase transition down to 2 K, as evidenced by powder X-ray diffraction and heat capacity measurements. The phase transition does not impact the magnetic properties of the Ni(II) and Mn(II) analogues; these high spin compounds display Curie behavior that is consistent with S = 1 and 5/2, respectively, down to 20 K, while the temperature-dependent magnetic moment for the Co(II) compound reveals a significant orbital contribution.engAtribución 3.0 Españajournal articlehttps://doi.org/10.3390/cryst10060472https://www.mdpi.com/2073-4352/10/6/472/htmopen accesschiralityconglomerate crystallizationX-ray crystallographyphase transitioncoordination complexesenantiomorphic space groupsQuímica inorgánica (Química)2303 Química Inorgánica