text: Yo, check it out, we got the facts to drop
  Recorded the pulsed jet, microwave spectrum non-stop
  1 : 1 adduct, CH2ClF and formaldehyde
  Connected through a C-H bond, wild and wide
  
  No weak bond here, it's C-H to the Cl
  Hanging tight, not an F, that's the deal
  H···Cl "bond length" at 2.918 Å
  That's how the connection's made, okay?
  
  Hold up, we ain't done, got more details to share
  Two C-H···O contacts, showing we care
  H···O distance at 2.821 Å
  That's how this complex comes into play
  
  Tunnelling splittings, formaldehyde's rotation
  We observed it all, no hesitation
  Estimating the barrier, 125(10) cm(-1)
  That's the struggle it faces, ain't no fun
  
  Now let's talk (35)Cl quadrupole coupling constants
  Gotta get the numbers, we're the avid proponents
  χaa, we got 31.131(7) MHz
  And χbb-χcc, -105.82(1) MHz, that's the buzz