The reactions of the tridentate hydrazone ligand, N'-[1-(pyridin-2-yl)ethylidene]acetohydrazide (HL), obtained by condensation of 2-acetylpyridine with acetic hyadrazide, with copper nitrate trihydrate in the presence of thiocyanate, or with CuCl2 produce two distinct coordination compounds, namely a one-dimensional helical coordination chain of [CuL(NCS)] n (1) units, and a doubly chlorido-bri...

Fluorescence and X-ray absorption spectroscopy were used to investigate the anion binding properties of a luminescent, dinuclear Au(I) N-heterocyclic carbene (NHC) complex ([1](2+)) with a short Au(I)···Au(I) contact. The addition of Br(-) ions to a DMSO solution of [1](PF(6))(2) caused a red-shift in the fluorescence emission band from 396 nm to 496 nm. Similarly, the addition of Br(-) ions to...

The reaction of copper(II) hydroxide with 2,2'-bipyridine (bipy) (1 : 1) in alkaline aqueous solution (pH 14) at room temperature affords the alternating carbonate/hydroxo-bridged copper(II) polymeric chain compound {[Cu3(bipy)3(mu-OH)2(mu-CO3)2].11H2O}n, 1, as determined by single-crystal X-ray diffraction. The structure of 1 is built up from two similar centro-symmetric dinuclear [(bipy)Cu(mu...

Two novel symmetrical bis!tetradentate Schi} base ligands\ H1L and H3L\ have been prepared from the condensation of N\N?!bis"2!aminopropyl#oxamide with pyridine!1!carbaldehyde and pyrrol!1!car! baldehyde\ respectively[ The ligands react with copper"II# nitrate in basic medium to yield the dinuclear complexes ðCu1LŁ"NO2#1 and ðCu1LŁ[ ðCu1LŁ"NO2#1 reacts with sodium azide to yield the neutral din...

We examined the cytotoxicity and cellular uptake in L1210 murine leukemia cells, as well as the coordinative reaction with the guanine derivative 9-ethylguanine (9EtG), of a series of μ-hydroxo-μ-tetrazolato dinuclear platinum(II) complexes (tetrazolato-bridged complexes), [{cis-Pt(NH3)2}2(μ-OH)(μ-tetrazolato-N1,N2)](2+) (5-H-X) and [{cis-Pt(NH3)2}2(μ-OH)(μ-5-R-tetrazolato-N2,N3)](n+), where R ...

The reaction of [(AuBr)2(μ-PR2P(CH2)nPR2)] (where R ) CH3 for n ) 1; R ) Ph for n ) 1, 3, 4) with N-alkylxanthine and thioxanthine derivatives, containing two ionizable protons in close positions, yields, under basic conditions, neutral heterobridged dinuclear gold(I) ring complexes [Au(μ-L)2(μ-PR2P(CH2)nPR2)], which have been investigated by means of 1Hand 31P-NMR and FAB spectroscopies. Cryst...

The reactions of various copper(ii) sources with 2-acetylpyridine, (py)(me)CO, and 2-benzoylpyridine, (py)(ph)CO, under strongly basic conditions have been studied and novel ligand transformations have been discovered. Reaction of Cu(ClO4)2·6H2O and (py)(me)CO in the presence of NBu4(n)OMe (1 : 1 : 1) in CHCl3 gave a mixture of [Cu2Cl2(HLA)2](ClO4)2 (1) and [Cu2Cl2(LB)2(ClO4)2] (2), where HLA i...