منابع مشابه
(E,E)-1,5-Di-2-thienylpenta-1,4-dien-3-one
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The asymmetric unit of the title compound, C(22)H(26)N(2)O, contains three crystallographically independent mol-ecules, in which the aromatic rings are oriented at dihedral angles of 21.74 (5), 27.59 (5) and 27.87 (5)°. Intra-molecular O-H⋯N hydrogen bonds result in the formation of planar six-membered rings, and these are nearly coplanar with the adjacent rings. In the crystal structure, π-π c...
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In the title compound, C(21)H(28)N(2)O, the dihedral angle between the rings is 35.2 (2)°. A weak intra-molecular O-H⋯N hydrogen bond is observed between the O-H H atom and the imine N atom. In the crystal, mol-ecules are linked by additional inter-molecular N-H⋯O hydrogen bonding, resulting in a wave-like chain along the b-axis direction.
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The title compound, [Sn(4)(C(4)H(9))(8)(C(15)H(12)NO(3))(2)(CH(3)O)(2)O(2)], is a centrosymmetric dimer and displays a ladder type structural motif. There are four Sn(IV) centres which can be divided into two sorts, viz. two endocyclic and two exocyclic. The endo- and exocyclic Sn(IV) centres are linked by bidentate deprotonated methanol and μ(3)-O atoms. Each exocyclic Sn(IV) centre is also co...
متن کاملI giornali delle sperienze e osservazioni relativi alla fisiologia della generazione e alla embriologia sperimentale
Reviewed by Mario A. Di Gregorio, M.A., Ph.D., F.L.S., Darwin College, Cambridge. The more the scope of research in the history of science widens, and the more intriguing the problems it touches appear to us, the more we feel the necessity to refer to the original sources represented by unpublished material. Thus archives are now invaluable points of reference in our research. It often happens ...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 1902
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.19021590307