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The diphenylgermanium bis-dithiocarbamates Ph2Ge(S2CR)2 (Ⅰ~Ⅷ) have been synthesized by the reaction of Ph2GeCl2 with RCS2Na in CH2Cl2 solvent.Their structures were characterized with IR,1H NMR,UV spectra and the in vitro antitumour activity are tested.In mentioned germanium complexes (Ⅰ~Ⅷ) the dithiocarbamatyl groups are monodentate ligands.