Abstract A series of 1-Organyl-3-ethylsilatranes,, where R= H2N (CH2) 3-, H2N (CH2) 2NH (CH2) 3-, H2N (CH2) 2NH (CH2) 2NH (CH2) 3-, CI (CH2) 3-, CH2 [dbnd] CH-, CH3CONH (CH2) 3-, H2NCONH (CH2) 3-, C6H9O (CH2) 2-, C3H5N2 (CH2) 3-, C3N3O3 (CH2CH2- CH2) 3-have been synthesised in yields ranging from 79 to 93% by transesterification of corresponding 1-organyltrialkoxysilanes with bis (2-hydroxyethyl)-2-hydroxybutylamine. ...