A contribution to 1-azapentadienylmetal chemistry: Si, Sn(II), Fe(II) and Co(II) complexes

Correction to “Synthesis, Structure, and Spectroscopy of the Biscarboranyl Stannylenes (bc)Sn·THF and K2[(bc)Sn]2 (bc = 1,1′(ortho-Biscarborane)) and Dibiscarboranyl Ethene (bc)CH═CH(bc)”

“…As reported earlier, one of the K + ions acts as a countercation which is coordinated to the B–H vertices of the bc cage, but the second K + ion, which was said to bridge the two tin atoms in the original report, has been reformulated as a Cl – ion, thereby forming a Sn–Cl–Sn bridging unit between two ( bc )Sn moieties, as in the {( bc )­Sn-μ-Cl-Sn­( bc )} − anion, as well as lowering the R value from 2.43% to 2.23%. Organotin complexes containing a Sn–Cl–Sn moiety typically have bridging Sn–Cl distances in the range 2.540(2)–2.967(1) Å, − and this fragment of compound 2 features Sn–Cl bond distances of 2.5868(8) and 2.5874(8) Å, which are at the lower end of the above range. The relatively short Sn–Cl distances in 2 indicate a strong interaction between the two ions, but whether this is a consequence of the rigid structure or electron-withdrawing influence of the bc ligand is not apparent.…”