The six-membered cyclopalladated complex di-μ-acetato-bis[2-(2 -thiazolylmethyl)phenyl-C 1 ,N]dipalladium(II), [{Pd(μ-O 2 CMe)(η 2 -bbt)} 2 ] (η 2 -bbt=2-(2 -thiazolylmethyl)phenyl-C 1 ,N), has been prepared by the reaction of palladium(II) acetate and 2-benzylbenzothiazole. Its di-μ-halogeno analogues [{Pd(μ-X)(η 2 -bbt)} 2 ], synthesised by the metathetical reaction with LiCl or NaX, undergo bridge-splitting reactions with some pyridine derivatives and thallium(I) acetylacetonate to yield corresponding mononuclear cyclopalladated complexes. The cyclopalladated feature and the six-membered structure have been confirmed by the 1 H NMR spectra of the mononuclear pyridine complexes. Temperature-dependent 1 H NMR spectra have been observed for [{Pd(μ-O 2 CMe)(η 2 -bbt)} 2 ] and [Pd(acac)(η 2 -bbt)] and are attributed to inversions of acetato bridges and the boat-formed six-membered ring, respectively.