As reported in 2019,
magnesium monobutadiynide (MgC4H or Mg–C≡C–C≡C–H) was detected toward
IRC +10216 by
Cernicharo and co-workers using the IRAM
30m telescope. The detection was based upon experimental
Forthomme et al. published in 2010.
Magnesium monobutadiynide has a dipole moment of 2.1 D.
Most of the magnesium-containing molecules detected to date, including MgC4H, are linear doublet
species. This includes
last month). Magnesium forms linear X–Mg–Y compounds, such as
HMgNC (detected in 2013), because
its 3s2 pair of electrons is recoupled.