0000000001300982
AUTHOR
Ian S. Morgan
Effect of a Rigid Sulfonamide Bond on Molecular Folding: A Case Study
A disulfonamide compound with bulky aromatic side chains was prepared, and its properties as a potential building block for foldamers were evaluated. Two different solvate crystal forms of the compound were identified and compared to the structures of an analogous oligoamide and related disulfonamides. The disulfonamide is unfolded in one of the solvates, whereas in the other one, a loosely folded conformer stabilized by an intramolecular hydrogen bond is found. Density functional calculations indicated that the loosely folded conformer is slightly more stable than its unfolded isomer. The calculations also identified a third, more tightly folded and more extensively hydrogen bonded, confor…
Synthesis of a labile sulfur-centred ligand, [S(H)C(PPh2S)2]−: structural diversity in lithium(i), zinc(ii) and nickel(ii) complexes
A high-yield synthesis of [Li{S(H)C(PPh2S)2}]2 [Li2·(3)2] was developed and this reagent was used in metathesis with ZnCl2 and NiCl2 to produce homoleptic complexes 4 and 5b in 85 and 93% yields, respectively. The solid-state structure of the octahedral complex [Zn{S(H)C(PPh2S)2}2] (4) reveals notable inequivalence between the Zn-S(C) and Zn-S(P) contacts (2.274(1) Å vs. 2.842(1) and 2.884(1) Å, respectively). Two structural isomers of the homoleptic complex [Ni{S(H)C(PPh2S)2}2] were isolated after prolonged crystallization processes. The octahedral green Ni(ii) isomer 5a exhibits the two monoprotonated ligands bonded in a tridentate (S,S',S'') mode to the Ni(ii) centre with three distinctl…
Synthesis and characterisation of p-block complexes of biquinoline at different ligand charge states
The first examples of p-block coordination complexes of biquinoline, namely [(biq)BCl2]Cl and [(biq)BCl2]˙, were synthesized and structurally characterized. The acquired data allowed the estimation of the ligand charge state based on its metrical parameters. The subsequent use of this protocol, augmented with theoretical calculations, revealed ambiguities in the published data for transition metal complexes of biquinoline. peerReviewed
Coordination Complexes of a Neutral 1,2,4-Benzotriazinyl Radical Ligand: Synthesis, Molecular and Electronic Structures, andMagnetic Properties
A series of d-block metal complexes of the recently reported coordinating neutral radical ligand 1-phenyl-3-(pyrid-2-yl)-1,4-dihydro-1,2,4-benzotriazin-4-yl (1) was synthesized. The investigated systems contain the benzotriazinyl radical 1 coordinated to a divalent metal cation, MnII, FeII, CoII, or NiII, with 1,1,1,5,5,5-hexafluoroacetylacetonato (hfac) as the auxiliary ligand of choice. The synthesized complexes were fully characterized by single-crystal X-ray diffraction, magnetic susceptibility measurements, and electronic structure calculations. The complexes [Mn(1)(hfac)2] and [Fe(1)(hfac)2] displayed antiferromagnetic coupling between the unpaired electrons of the ligand and the meta…
Coexistence of long-range antiferromagnetic order and slow relaxation of the magnetization in the first lanthanide complex of a 1,2,4-benzotriazinyl radical
The first lanthanide complex of a 1,2,4-benzotriazinyl radical (1), Dy(1)(tbacac)3 (2, tbacac = 2,2,6,6-tetramethyl-3,5-heptane-dionato), was synthesised and found to have an antiferromagnetically ordered ground state with a metamagnetic phase diagram and a critical field of 0.91 T at 1.85 K. The application of a small dc field revealed the single-molecule magnet behaviour of 2, illustrating the coexistence of long-range antiferromagnetic order and slow relaxation of the magnetization. peerReviewed
Comment on “Crystallographic Snapshot of an Arrested Intermediate in the Biomimetic Activation of CO2”
Out of focus: A recent Communication published in this journal describes the synthesis of [nBu4 N]HCO3 . The authors performed a single-crystal X-ray study that revealed a putative species described as an incipient hydroxide ion engaging in a long, and presumably weak, interaction with CO2 . Our recent exploration of the coordination chemistry of CO2 with small ions leads us to believe that such an exceptional bonding situation is unlikely. Instead, we argue that the crystal structure is that of [nBu4 N]O2 CCH3 and therefore not representative of the bulk powder from the synthesis.
1‑Phenyl-3-(pyrid-2-yl)benzo[e][1,2,4]triazinyl: The First "Blatter Radical" for Coordination Chemistry
A neutral air- and moisture-stable N,N′-chelating radical ligand, 1-phenyl-3-(pyrid-2-yl)benzo[e][1,2,4]triazinyl (1) was synthesized and characterized by electron paramagnetic resonance spectroscopy, X-ray crystallography, and magnetic measurements. Subsequent reaction of 1 with Cu(hfac)2·2H2O (hfac = hexafluoroacetylacetonate) under ambient conditions afforded the coordination complex Cu(1)(hfac)2 in which the radical binds to the metal in a bidentate fashion. Magnetic susceptibility data collected from 1.8 to 300 K indicate a strong ferromagnetic metal-radical interaction in the complex and weak antiferromagnetic radical···radical interactions between the Cu(1)(hfac)2 units. Detailed com…
CCDC 1424396: Experimental Crystal Structure Determination
Related Article: Ramalingam Thirumoorthi, Tristram Chivers, Susanna Häggman, Akseli Mansikkamäki, Ian S. Morgan, Heikki M. Tuononen, Manu Lahtinen, Jari Konu|2016|Dalton Trans.|45|12691|doi:10.1039/C6DT02565J
CCDC 1424395: Experimental Crystal Structure Determination
Related Article: Ramalingam Thirumoorthi, Tristram Chivers, Susanna Häggman, Akseli Mansikkamäki, Ian S. Morgan, Heikki M. Tuononen, Manu Lahtinen, Jari Konu|2016|Dalton Trans.|45|12691|doi:10.1039/C6DT02565J
CCDC 1057508: Experimental Crystal Structure Determination
Related Article: Ian S. Morgan, Akseli Mansikkamäki, Georgia A. Zissimou, Panayiotis A. Koutentis, Mathieu Rouzières, Rodolphe Clérac and Heikki M. Tuononen|2015|Chem.-Eur.J.|21|15843|doi:10.1002/chem.201501343
CCDC 1022891: Experimental Crystal Structure Determination
Related Article: Aku Suhonen, Ian S. Morgan, Elisa Nauha, Kaisa Helttunen, Heikki M. Tuononen, Maija Nissinen|2015|Cryst.Growth Des.|15|2602|doi:10.1021/acs.cgd.5b00424
CCDC 1057512: Experimental Crystal Structure Determination
Related Article: Ian S. Morgan, Akseli Mansikkamäki, Georgia A. Zissimou, Panayiotis A. Koutentis, Mathieu Rouzières, Rodolphe Clérac and Heikki M. Tuononen|2015|Chem.-Eur.J.|21|15843|doi:10.1002/chem.201501343
CCDC 1022892: Experimental Crystal Structure Determination
Related Article: Aku Suhonen, Ian S. Morgan, Elisa Nauha, Kaisa Helttunen, Heikki M. Tuononen, Maija Nissinen|2015|Cryst.Growth Des.|15|2602|doi:10.1021/acs.cgd.5b00424
CCDC 1518784: Experimental Crystal Structure Determination
Related Article: Juha Hurmalainen, Akseli Mansikkamäki, Ian S. Morgan, Anssi Peuronen, Heikki M. Tuononen|2017|Dalton Trans.|46|1377|doi:10.1039/C6DT04504A
CCDC 1022889: Experimental Crystal Structure Determination
Related Article: Aku Suhonen, Ian S. Morgan, Elisa Nauha, Kaisa Helttunen, Heikki M. Tuononen, Maija Nissinen|2015|Cryst.Growth Des.|15|2602|doi:10.1021/acs.cgd.5b00424
CCDC 1022890: Experimental Crystal Structure Determination
Related Article: Aku Suhonen, Ian S. Morgan, Elisa Nauha, Kaisa Helttunen, Heikki M. Tuononen, Maija Nissinen|2015|Cryst.Growth Des.|15|2602|doi:10.1021/acs.cgd.5b00424
CCDC 1057511: Experimental Crystal Structure Determination
Related Article: Ian S. Morgan, Akseli Mansikkamäki, Georgia A. Zissimou, Panayiotis A. Koutentis, Mathieu Rouzières, Rodolphe Clérac and Heikki M. Tuononen|2015|Chem.-Eur.J.|21|15843|doi:10.1002/chem.201501343
CCDC 1057510: Experimental Crystal Structure Determination
Related Article: Ian S. Morgan, Akseli Mansikkamäki, Georgia A. Zissimou, Panayiotis A. Koutentis, Mathieu Rouzières, Rodolphe Clérac and Heikki M. Tuononen|2015|Chem.-Eur.J.|21|15843|doi:10.1002/chem.201501343
CCDC 1486829: Experimental Crystal Structure Determination
Related Article: Ramalingam Thirumoorthi, Tristram Chivers, Susanna Häggman, Akseli Mansikkamäki, Ian S. Morgan, Heikki M. Tuononen, Manu Lahtinen, Jari Konu|2016|Dalton Trans.|45|12691|doi:10.1039/C6DT02565J
CCDC 1057507: Experimental Crystal Structure Determination
Related Article: Ian S. Morgan, Akseli Mansikkamäki, Georgia A. Zissimou, Panayiotis A. Koutentis, Mathieu Rouzières, Rodolphe Clérac and Heikki M. Tuononen|2015|Chem.-Eur.J.|21|15843|doi:10.1002/chem.201501343
CCDC 1036823: Experimental Crystal Structure Determination
Related Article: Juha Hurmalainen, Michael A. Land, Katherine N. Robertson, Christopher J. Roberts, Ian S. Morgan, Heikki M. Tuononen and Jason A. C. Clyburne|2015|Angew.Chem.,Int.Ed.|54|7484|doi:10.1002/anie.201411654
CCDC 1424394: Experimental Crystal Structure Determination
Related Article: Ramalingam Thirumoorthi, Tristram Chivers, Susanna Häggman, Akseli Mansikkamäki, Ian S. Morgan, Heikki M. Tuononen, Manu Lahtinen, Jari Konu|2016|Dalton Trans.|45|12691|doi:10.1039/C6DT02565J
CCDC 1057506: Experimental Crystal Structure Determination
Related Article: Ian S. Morgan, Akseli Mansikkamäki, Georgia A. Zissimou, Panayiotis A. Koutentis, Mathieu Rouzières, Rodolphe Clérac and Heikki M. Tuononen|2015|Chem.-Eur.J.|21|15843|doi:10.1002/chem.201501343
CCDC 1563199: Experimental Crystal Structure Determination
Related Article: Ian S. Morgan, Akseli Mansikkamäki, Mathieu Rouzières, Rodolphe Clérac, Heikki M. Tuononen|2017|Dalton Trans.|46|12790|doi:10.1039/C7DT02766D
CCDC 1057509: Experimental Crystal Structure Determination
Related Article: Ian S. Morgan, Akseli Mansikkamäki, Georgia A. Zissimou, Panayiotis A. Koutentis, Mathieu Rouzières, Rodolphe Clérac and Heikki M. Tuononen|2015|Chem.-Eur.J.|21|15843|doi:10.1002/chem.201501343
CCDC 1518783: Experimental Crystal Structure Determination
Related Article: Juha Hurmalainen, Akseli Mansikkamäki, Ian S. Morgan, Anssi Peuronen, Heikki M. Tuononen|2017|Dalton Trans.|46|1377|doi:10.1039/C6DT04504A