Jiro Toyoda

Cation-Dependent Formation of Superstructures by One-Pot Self-Organization of Hydrogen-Bonded Nickel Complexes

Four different types of molecular arrangements can be formed by one-pot synthesis, depending on the type of counter cation used, when a new anionic tris(biimidazolato)nickel(II) complex is used to form a network held together by hydrogen bonds. The connections occur through biimidazolate ligands, which can act as hydrogen bond donor as well as acceptor (see scheme).

Carbonyl ylide from 3-chloro-3-p-nltrophenylcarbene and acetone

Abstract 3-chloro-3-p-nitrophenylcarbene readily reacts with acetone to from carbonyl ylide which undergoes 1,3 cycloaddition with dipolarophiles.

Preparation and characterization of a new inclusion compound with a 1D molecular arrangement of organic radicals using a one-dimensional organic homogeneous nanochannel template

A new inclusion compound with a one-dimensional molecular arrangement of organic radicals (2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO)) was prepared using the template compound of tris(o-phenylenedioxy)cyclotriphosphazene (TPP) by the following two methods: i) adsorption of TEMPO vapor under vacuum at 313 K and ii) slow recrystallization in mesitylene. The arrangement of TEMPO molecules in the TPP 1D nanochannel was confirmed by thermogravimetric analysis (TG), powder XRD and ESR measurements. TEMPO molecules were accommodated in the TPP nanochannel with no decomposition, and were arranged with the orientation of the nitroxide group in the TEMPO molecule perpendicular to the axis of the nanochannel. The TPP/TEMPO inclusion compound can include TEMPO molecules up to one molecule per unit cell in the TPP crystal lattice.

Structures of the novel dimers of 1-alkoxy-2-benzopyrylium-4-olates

Abstract The structure of novel type dimers of 1-methoxy- and 1-isopropoxy-2-benzopyrylium-4-olates was determined by spectroscopic and single-crystal X-ray structural analyses to have 4-alkoxy-5-(o-alkoxycarbonylphenyl)-4,7;5,6-bisepoxy-2-benzocycloheptan-1-ones.

Cyananilate anion as hydrogen bonded counter ion in conducting CT complexes

The types of the hydrogen bond unit of the cyananilate anion in the charge transfer complexes were classified into four categories to characterize this anion as the synton for the crystal engineering.

Hydrogen-bonded CT-complex of cyananilic acid with OMTTF: (OMTTF)3(HCNAL)2

In the charge transfer complex prepared from OMTTF and cyananilic acid (H 2 CNAL), a trimer of the donor molecules was formed and was surrounded by the hydrogen bonded network consisted of monoanion, hydrogen cyananilate (HCNAL).

Wasserstoffbrückenbindungs‐induzierte Selbstassoziation eines anionischen Nickelkomplexes zu Überstrukturen, deren Art vom Gegenkation abhängt

Vier verschiedenartige supramolekulare Anordnungen konnen in einer Eintopfsynthese – je nach Art der vorhandenen Gegenionen – durch intermolekulare Vernetzung eines neuen anionischen Tris(biimidazolato)nickel(II)-Komplexes uber Wasserstoffbruckenbindungen entstehen. Die Verknupfung erfolgt uber die Biimidazolatliganden, die sowohl als H-Bruckendonor wie auch als -acceptor fungieren (siehe Schema).

Three-Dimensional H-Bonded Networks Based on Mono- and Tetranuclear Metal-Pteridine Complexes

Abstract The crystal structure of the transition metal-pteridine complexes having three-dimensional hydrogen-bonded (H-bonded) network and stacking interactions between pteridine ligands are described; (1) Mononuclear copper(II)-pteridine complex and (2) Tetranuclear palladium(II)-pteridine complex.

H-bonded system of 1-D d and π states; [Pd(H2EDAG)(HEDAG)]TCNQ

Abstract Optical and electrical conductivity measurements have been made on [Pd(H 2 EDAG)(HEDAG)]TCNQ (H 2 EDAG = ethylenediaminoglyoxime). The metal-insulator transition was observed. Around the metal-insulator transition temperature, new vibration bands appeared at 3250cm −1 , indicating that this salt is a strongly electron-proton coupled system.

Molecular Architectures Based on Hydrogen Bond and Coordination Bond Toward New Functionality

Abstract we report the design of new molecular building blocks with hydrogen-bonding sites and the production of a variety of molecular architectures by hydrogen-bonds and coordination bonds. We selected the ligands, such as biimidazole, pterine, lumazine, and glyoxime which have chelating ability to a metal element and multi-hydrogen-bonding sites.