Pyrolysis studies of main group metal‐alkyl bond dissociation energies: VLPP of GeMe₄, SbEt₃, PbEt₄, and PEt₃

The bond dissociation energies of tetramethyl germane, triethyl stibine, tetraethyl lead, and triethylphosphine were determined using the technique of very‐low‐pressure pyrolysis. Arguments are presented for log A ≥ 17.0. The respective dissociation energies Δ H 298 are 83, 57, 54, and 68 (±2) kcal/mol. A consistent set of methyl bond energies to main group metals is determined from these and previous results, and is examined for trends. Bond energies for various radicals to tin are also derived.