Abstract Bi-, tri-, and quadridentate alkoxyethylphosphanes of the type RI 1 n P (CH 2 CH 2- OR 2) 3-n are obtained from the correspon R 1= Ph, Cy (= cyclo-C 6 H 11)) and 1, 2- alkoxychloroethanes ClCH 2 CH 2 OR 2 (R 2= Me, i-Pr). It was demonstrated using the following examples, Ph 2 PCH 2 CH 2 OMe, Cy 2 PCH 2 CH 2 OMe, and Cy 2 PCH 2 CH 2 O (i-Pr), that these ligands lead to the chelate complexes (OC) 4 WPR12CH2CH2OR 2 ...