Graphical Abstract: It is shown that the only reason of structural distortions of ketene molecule coordinated in the complexes VCp2-H2C2O (I) and Pt(PPh3)2-H2C2O (II) is the pseudo Jahn-Teller effect induced by the orbital charge transfers by coordination. The η2-(C-O) coordination and the in-plane distortion of ketene in the complex (I) is due to the PJTE induced by the back donation to its LUMO 3b2. The η2-(C-C) coordination mode, and the out-of-plane distortion of the molecule in the complex (II) is caused by two OSTs: from the HOMO 2b1 to the metal, and from the dxy-AO of Pt to the vacant 3b1 MO of ketene, thus being the result of the diorbital Pt-ketene interaction.