Reference

Readily prepared metallo-supramolecular triple helicates designed to exhibit spin-crossover behaviour

Some chemicals with cas registry numbers like 3034-50-2 and 824976-05-8 are also used. Readily prepared metallo-supramolecular triple helicates designed to exhibit spin-crossover behaviour. Tuna, Floriana; Lees, Martin R.; Clarkson, Guy J.; Hannon, Michael J. ( Centre for Supramolecular and Macromolecular Chemistry Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK). Chemistry--A European Journal, 10(22), 5737-5750 (English) 2004 Wiley-VCH Verlag GmbH & Co. KGaA. CODEN: CEUJED. ISSN: 0947-6539. DOCUMENT TYPE: Journal CA Section: 78 (Inorganic Chemicals and Reactions) Section cross-reference(s): 75, 77 New dinuclear supramol. cylinders were designed to exhibit spin-crossover behavior, a form of mol. bistability. This was achieved within the framework of the authors' imine-based approach to supramol. architecture by switching from pyridylimine systems to imidazolimines. The imidazolimine (I) complexes [Fe2(L)3]X4 (L = I; X = PF6 (1), BF4 (2), ClO4 (3)), [M2(L)3](PF6)4 (M = Ni (4), Co (5), Mn (6)) were prepd. and their crystal structures detd. The complexes were further characterized by 1H NMR and electronic spectra and by variable temp. magnetic susceptibility measurements. Spin-crossover behavior is achieved while retaining the simplicity and ease-of-synthesis of the authors' mol. design. The imidazole groups used also introduce addnl. NH groups that engage in hydrogen-bonding to anions and solvents. In the case of the iron(II) tetrafluoroborate complex this hydrogen bonding links supramol. cylinders into an extended two-dimensional array. Consistent with this, a sharper spin-crossover transition is obsd. for this compd. than for the corresponding hexafluorophosphate salt. More subtle anion effects are indicated in the perchlorate salt which gives a two-step spin conversion, thereby displaying tristability. .

Synthesis of imidazole phosphinic acids as I4AA analogues

Some chemicals with cas registry numbers like 3034-50-2 are also used. Synthesis of imidazole phosphinic acids as I4AA analogues. Orain, David; Mattes, Henri (Global Discovery Chemistry-Neuroscience, Novartis Institute for Biomedical Research Basel, Basel CH-4002, Switz.). Tetrahedron Letters, 47(8), 1253-1255 (English) 2006 Elsevier B.V. CODEN: TELEAY. ISSN: 0040-4039. DOCUMENT TYPE: Journal CA Section: 29 (Organometallic and Organometalloidal Compounds) The GABAC receptor has been identified as a potentially attractive target involved in a no. of eye diseases. TPMPA is the best antagonist reported so far. The synthesis of two new pharmacophores, 4-imidazolmethyl-n-butylphosphonic acid and 4-imidazolethyl-n-butylphosphonic acid, based on imidazole phosphinic acid core structure will be presented. The compds. were prepd. in several steps starting from 4-formylimidazole. .