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Toxic Effects of Organotin Species on Algae
Author(s) -
Huang Guolan,
Dai Shugui,
Sun Hongwen
Publication year - 1996
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/(sici)1099-0739(199606)10:5<377::aid-aoc487>3.0.co;2-t
Subject(s) - chemistry , toxicity , algae , substituent , tributyltin , stereochemistry , dithiocarbamate , organic chemistry , botany , biology
The inhibition by 20 organotin compounds (R n SnX 4− n ), which included some newly synthesized pesticides, of the growth of two green algae ( Scenedesmus obliquus and Platymonas sp.) was studied. The influence of the counterion X group on the toxicity of organotins was discussed. The destruction of submicrostructures of the algal cell by organotins was viewed by micrography and electron microscope scanning. It was found that the toxicity of the organotins varied significantly according to their substitution. The order of toxicity is tri‐ ≫ di‐ ⩾ mono‐organotins. Within the same substituent series, the toxicity depends on the properties of both R and X groups. The larger and the more lipophilic the R group, the more toxic is the organotin. The influence of the X group is more complex: when X is a small easily ionizable group, it has little effect on the toxicity; however, when it is a large organic group, it does change the bioactivity of the organotin. Large organic groups may influence the polarizability of the central tin atom, and so change the toxicity of organotins.