A series of organometallic rhodium complexes with curcuminoid ligands (1−9) have been synthesized and characterized by NMR, IR, elemental analysis, and HR-ESI-mass spectrometry. The molecular structure of complex 9 has been characterized by X-ray crystallography. The in vitro activities of all the compounds have been evaluated against the HeLa, HepG2, CNE-2, SGC-7901, KB human cancer cell lines and