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. 2009 Sep 3;109(12):6858–6919. doi: 10.1021/cr900053k

Table 6. Bond Valence Parameters, R0 and b in Å in eq 26, for Hydrogen Bonds.

cation anion r0 b   sourcea reference remarks
H 1+ O 0.781 0.56 ID 178  
H 1+ O 0.957 0.35   213 From gas and symmetrical bond length
H 1+ O 0.925 0.40 I 213  
H 1+ O 0.870 0.457   124 4.0 Å cutoff, b determined from softness
H 1+ O 0.790 0.37 I 65 For s > 0.5 vu, see Section 21
H 1+ O 1.409 0.37 I 65 For s < 0.5 vu, see Section 21
H 1+ F 0.708 0.558   124 4.5 Å cutoff, b determined from softness
H 1+ Cl 1.336 0.53 ID 178  
H 1+ S 1.192 0.591   124 5.5 Å cutoff, b determined from softness
H 1+ N 1.014 0.413   25 From gas and symmetrical bond length
a

CD from structures in the Cambridge Structural Database. ID from structures in the Inorganic Crystal Structure Database. I from selected inorganic structures.

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