The isomerization of triplet and singlet HC drop GeF to C=Ge(H)(F) and to (H)(F)C=Ge have been studied by various computational methods. Our theoretical investigations suggest that electronegative halogen groups can considerably stabilize a carbon-germanium triple bond. In particular, triplet HC drop GeF. rather than singlet HC=GeF, is predicted to be a promising candidate for isolation as a long-lived molecule.