Can H…σ, π…H+…σ and σ…H+…σ interactions be classified as H-bonded?

The following complexes are analyzed: FH…H2, C2H2…H+…H2 and H2…H+…H2 where specific interactions possessing characteristics which can be attributed to hydrogen bonds exist (X-H…σ, π…H+…σ and σ…H+…σ). The results indicate that these interactions possess some characteristics typical for classical hydrogen bonds.