the equilibrium constant of adduct formation between some triorganotin chloride of the type r3sncl (r=c6h5, p-ch3c6h4, n-ch3)ch2)3, c6h5-ch2 and lewis bases cl¯, br¯, and i¯, were measured in 50% v/v ethanol-water solvent spectrophotometrically. the average equilibrium constant values for the systems studied shows the following acceptor trend of tin(iv) in the triorganotin chlorides: p-tolyl > ...

The equilibrium constant of adduct formation between some triorganotin chloride of the type R3SnCl (R=C6H5, p-CH3C6H4, n-CH3)CH2)3, C6H5-CH2 and Lewis bases Cl¯, Br¯, and I¯, were measured in 50% v/v ethanol-water solvent spectrophotometrically. The average equilibrium co...

A series of new diand triorganotin(IV) complexes of monoisopropyl and mono n-propyl glutarate have been synthesized and characterized by HCSn-NMR, UV, IR and Mass spectrometry. The spectroscopic investigation demonstrated that the carboxylate group acts as a bidentate ligand in diorganotin(IV) and as a monodentate ligand in triorganotin(IV) compounds. Biological evaluation against various micro...

Reaction(s) of 5'-guanosine monophosphate (5'GMP) with di- and triorganotin(IV) chloride(s) led to formation of organotin(IV) derivatives of general formulae, [R2Sn(5'-GMP)·H2O] n and [(R'3Sn)2(5'-GMP)·H2O] n , where R = Me, n-Bu, and Ph; R' = Me, i-Pr, n-Bu, and Ph; (5'-GMP)(2-) = 5'-guanosine monophosphate. An attempt has been made to prove the structures of the resulting derivatives on the b...

Organotin compounds are typical environmental contaminants and suspected endocrine-disrupting substances, which cause irreversible sexual abnormality in female mollusks, called "imposex". However, little is known about the capability of triorganotin compounds, such as tributyltin and triphenyltin, to cause disorders in the sexual development and reproductive functions of mammals, including huma...

A series of di- and triorganotin 3,6-dioxaheptanoates and 3,6,9-trioxadecanoates were synthesized and characterized by (1)H, (13) and (117)Sn NMR, electrospray mass and (119m)Sn Mössbauer spectroscopy, as well as elemental analysis. Their in vitro antitumour activity against seven tumoural cell lines of human origin, two breast cancers (MCF-7, EVSA-T), a colon carcinoma (WiDr), an ovarian cance...

Stannyloligosilanes, Preparation, Crystal Structure Stannyloligosilanes 1 and 2 with terminal organotin groups are available by reacting alkali metal trior diorganostannides with a,-dichloroor difluorosilanes, or by treatm ent of organochlorostannanes with a,a»-difluorosilanes in the presence o f m agnesium . A ttem pts to functionalize the triorganotin derivatives 2 by halogenation reagents...

Three triorganotin(IV) complexes of composition R3SnLH (R = Me, Bu and Ph and LH = 2-[(E)-2-(4-hydroxy-3,5-dimethylphenyl)-1-diazenyl]benzoate) have been synthesized and characterized by 1H-,13C-, 119SnNMR, and IR spectroscopic techniques in combination with elemental analysis. The crystal structures of the carboxylate ligand HO2CC6H4N=N(C6H2-4-OH-3,5-(CH3)2)-o in its neutral form and three tri...

A series of triorganotin dithiocarbamates R3SnS2CNR′2 (R = Cy, Ph; NR′2 = NEt2, N(n-Bu)2, N(i-Bu)2, N(n-Pr)2, N(CH2)5, NH(n-Pr), NH(n-Bu), NH(i-Bu)) has been synthesized using a low-temperature method. Their structures have been characterized by IR, Mössbauer and NMR spectroscopies. In the solid state, an unsymmetrical chelation of the dithiocarbamate ligand was found in all the compounds synth...

Features of pesticide synergism and acetylcholinesterase (AChE) inhibition (in vitro) were studied using a selected range of organotin compounds against the early 4th instar larvae of a highly resistant strain of the diamondback moth (DBM), Plutella xylostella, a major universal pest of cruciferous vegetables.Fourteen triorganotin compounds were evaluated for their ability to enhance the toxici...