@article { ISI:000272896300048,
	title = {Magnetic phase transition in valence tautomers as polymorphs of 3-iodolawsone: Single crystal X-ray structure, DSC and EPR studies},
	journal = {Journal of Molecular Structure},
	volume = {938},
	number = {1-3},
	year = {2009},
	month = {DEC},
	pages = {328-335},
	publisher = {ELSEVIER SCIENCE BV},
	address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS},
	abstract = {<p>Three polymorphs of 3-iodolawsone (I-III) have been isolated and characterized by single crystal X-ray diffraction, electron paramagnetic resonance (EPR) spectroscopy and differential scanning calorimetry (DSC) techniques. Polymorphs I and II were crystallized from methanol in two different valence tautomeric forms: hydroxynaphthoquinone (HNQ) and hydroxynaphthoseimquinone (HNSQ) as needles and thick plates, respectively. Polymorph III was crystallized from ethanol in HNQ form, as thin plates Chiral crystals of I belongs to the orthorhombic P2(1)2(1)2(1) space group: II and III belong to the monochnic non-centrosymmetric space group Cc. The molecules are packed via O-H O bonding and pi . pi stacking interactions. The study reveals that relatively stronger intermolecular H-bonding (2.02 angstrom) and most favoured pi . pi stacking (similar to 3 49 angstrom) interactions lead II to HNSQ radicals, presence of which was confirmed by EPR (g = 2.0052) spectroscopy. Interestingly, these materials exhibit crystal-to-crystal magnetic phase transition from polymorph I (diamagnetic) to polymorph II (paramagnetic structure) at 171.1 degrees C as identified by DSC and X-ray crystallographic studies (C) 2009 Elsevier B.V. All rights reserved</p>},
	keywords = {3-Iodolawsone, Hydroxynaphthoquinone (HNQ), Hydroxynaphthosemiquinone radical (HNSQ), Magnetic phase transition, Polymorphs, Valence tautomers},
	issn = {0022-2860},
	doi = {10.1016/j.molstruc.2009.10.005},
	author = {Zaware, Santosh B. and Dagade-Waghmode, Shobha and Gonnade, Rajesh G. and Srinivas, Darbha and Rane, Sandhya Y.}
}
@article {44587,
	title = {Modern trends in inorganic chemistry: celebration of inorganic chemistry in India},
	journal = {Journal of Chemical Sciences},
	volume = {130},
	year = {2018},
	month = {JUL},
	pages = {Article Number: UNSP 75},
	doi = {10.1007/s12039-018-1499-z},
	author = {Chikkali, Samir H. and Anand, Venkataramanarao G. and Srinivas, Darbha and Kumbhar, Avinash S.}
}
