The dimeric Zintl ion [Hg(2)(As(7))(2)](4-) has been synthesized with high crystalline yield from the reaction of an ethylendiamine solution of the intermetallic Zintl phase K(3)As(7) with diphenyl mercury. Single crystal X-ray diffraction of [K(2,2,2-crypt)](4)[Hg(2)As(14)], 1 (2,2,2-crypt = 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]-hexacosane), reveals that the cluster anion exhibits a...

Fifth generation ethylendiamine-core poly(amidoamine) (PAMAM G5) is presented as an efficient capping agent for the preparation of metal and semiconductor nanoparticles by ps laser ablation in water. In particular, we describe results obtained with the fundamental, second and third harmonic of a ps Nd:YAG laser and the influence of laser wavelength and pulse energy on gold particle production a...

The kinetics of the [Ni N,N'-bis(β-carbamoylethyl) ethylendiamine)]2+/Cu2+, Ni(bcen)2+/Cu2+ metal exchange reaction in aqueous solution has been studied using spectrophotometry to follow Cu(bcen)2+ formation at 640 nm (bcen is N,N'-bis(β-carbamoylethyl) ethylendiamine). The reaction was studied at pH 6.9, ionic strength 0.5 M and in the temperature range 15 to 35 °C. The kinetics was studied un...

The synthesis of four novel platinum complexes, bearing N6-(6-amino-hexyl)adenosine or a 1,6-di(adenosin-N6-yl)-hexane respectively, as ligands of mono-functional cisplatin or monochloro(ethylendiamine)platinum(II), is reported. The chemistry exploits the high affinity of the charged platinum centres towards the N7 position of the adenosine base system and a primary amine of an alkyl chain inst...

In this work was synthesized an amino-steroid derivative (4); the route involved preparation of dihydrotestosterone-hemisuccinate (2) by the esterification of dihydrotestosterone (1) using succinic anhydride and pyridine (method A) or using succinic acid and 1,3 dicyclohexylcarbodiimide in presence of p-toluensulfonic acid (method B). After 2 was coupled to 4-hidroxy benzoic acid using 1,3 dicy...