Sulfur bond enthalpy terms

Table 15.2 Some covalent bond enthalpy terms (kJmol ) for bonds involving oxygen, sulfur, selenium and tellurium.

Like water, the H2S molecule is V-shaped. The bond angle in H2S (12.6) is found to be close to 90°, which can be taken to indicate that sulfur makes use of almost pure p orbitals in its bonds to hydrogen. The strength of the S—H bond is lower than that of the O—H bond, as a comparison of bond enthalpy terms shows B(0—H), 464kJmol- 5(S-H), 364kJmoH. 

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