In this work, we determine the crystal structure of bis(acetato)(meso-tetraphenylporphyrinato)germanium(III), Ge(tpp)(OAc)(2). Experimental results indicate that the germanium atom has an octahedral coordination geometry. The geometry around the germanium center of the Ge(tpp)(OAc)(2) molecule has Ge-O(1) = 1.874(5) Angstrom and an average Ge-N = 1.999 Angstrom. The acetate groups are unidentately coordinated io the germanium(I) atom. In the title compound, (acetato)(meso-tetraphenylporphyrinato)indium(III), In(tpp)(OAc), the coordination sphere of the In3+ ion is an approximately square-based pyramid in which the apical site is occupied by an asymmetric (chelating) bidentate OAc- group. The average In-N bond distance is 2.173(3) Angstrom, and the In atom is displaced 0.762 Angstrom from the porphyrin plane. The In-O(1) and In-O(2) distances are 2.322(4) and 2.215(4) Angstrom, respectively. To develop the correlations between the C-13 chemical shifts of the acetato ligand and types of carboxylate coordination, this work also thoroughly examines the C-13 NMR data of the methyl and carbonyl carbons on 13 acetato porphyrinato metal complexes M(por)(OAc)(n) with n = 1, 2, por tpp, tmpp (5,10,15,20-tetrakis(4-methoxyphenyl)porphyrinate), tpyp (5,10,15,20-tetrakis(4-pyridyl)porphyrinate), and M = Ga, In, TI, Gt, Sn, According to these results, the C-13 methyl and carbonyl chemical shifts of the acetato group at 24 degrees C are separately located at 20.5 +/- 0.2 and 168.2 +/- 1.7 ppm for the acetate, which is unidentately coordinated to the metal (i.e., the unidentate case) and at 18.0 +/- 0.7 and 175.2 +/- 1.6 ppm for the chelating bidentate case.