At present ethylenediamine is one of the more studied nitrogen— —ligands. The main physico—chemical properties of this diamine are reported in this survey. The fundamental techniques for its purification and storage and its acid—base characteristics in aqueous solution are described. The formation constants of the complexes with various metal ion, the thermodyna mic values relative to the react...

A novel, mixed-valent copper(I)-copper(II) complex, {[bis(ethylene-diamine)copper(II)] bis[diiodocuprate(I)]} (1), has been prepared by electrochemical dissolution of a sacrificial copper anode in a solution of ethylenediamine (en), I2 and tetraethylammoniumperchlorate (TEAP) as supporting electrolyte in acetonitrile (AcN)and characterized by single-crystal X-ray structure determination. The cr...

The [4.3.0]heterobicyclic title structure, C(19)H(14)BNO(3), is composed of a five-membered OBNC(2) ring and a six-membered OBNC(3) ring, each of which has an approximate envelope conformation. The coordination geometry of the B atom is distorted tetra-hedral. In the crystal structure, centrosymmetrically related mol-ecules are associated through pairs of O-H⋯O hydrogen bonds.

The mol-ecule of the title compound, [Sn(C(5)H(5)S)(4)], lies on a special position of site symmetry. The Sn(IV) atom shows a slightly distorted tetra-hedral coordination.

The aim of research the synthesis 5,11,17,23-tetra(t-butyl)-25-monohydroxy-26,27,28-tribenzoyloxycalix[4]arene (TBMTCA) material were by one-step synthesized benzoylation reaction 5,11,17,23-tetra(t-butyl)-25,26,27,28-tetrahydroxycalix[4]arene (TBCA) and benzoyl chloride is (1: 3,7) mol refluxing 3 hours at room temperature predicted mechanism models. product was carried out means FTIR 1H-NMR s...

We have previously demonstrated that metal oxide ultrathin films, by themselves, can produce imprinted cavities for organic molecules. In the present study, memorization of the coordination environments of metal ions was achieved by incorporation of diamine chelating ligands in thin films of metal oxides. The films imprinted with Cu2+ or Zn2 + showed selective binding to the template over the c...

The reaction of 1-oxo-1,2,3,4-tetrahydrocarbazoles (1a-e) with paraformaldehyde and ethylenediamine yielded N,N'-bis(1,2,3,4-tetrahydrocarbazol-1-ylidene)ethane-1,2-diamines (2a-e). Here, like in another similar attempt of replacing ethylenediamine by ethanolamine, ended up in formation of 2-{[1-(2-(2-aminoethoxy)ethylimino)-1,2,3,4-tetrahydrocarbazol-2-yl-methyl]amino}ethanols (3a-e). These pr...

Abstract Background The potato ( Solanum tuberosum L.) is an important food crop in the alkaline soil area of northwest China. It abundant ascorbic acid (vitamin C), which facilitates iron absorption body. large consumption makes it a good source for human However, deficiency regions reduced chlorophyll synthesis leaves, resulting lower photosynthesis and less sugar supply to plant's healthy or...

Synthesized of novel metal (II)- tetra-4-(N,N-dimethyl phenyl) methan-imine phthalocyanines (MTDMPhImPc) [ M = Co, Ni, Cu, Zn] by an effective and suitable method. The tetra-nitrophthalocyanines converted into aminophthalocyanines reduction. Than amino derivatives bearing to form tetra substituted 4-(N,N-dimethyl methane-imine complexes. These compounds were characterized FTIR, elemental analys...

The novel pentaborate with a transition-metal complex as counter-cation and with water of crystallization, tris(ethylenediamine)cobalt(II) bis[4,4',6,6'-tetrahydroxy-2,2'-spirobi(cyclotriboroxane)(1-)] dihydrate, [Co(C(2)H(8)N(2))(3)][B(5)O(6)(OH)(4)](2)·2H(2)O, forms a three-dimensional supra-molecular framework through O-H⋯O hydrogen bonding among the [B(5)O(6)(OH)(4)](-) anions with large ch...