Tetrahedral ions and molecules

By the addition of one 0 atom to the four kinds of pyramidal ions and molecules of the previous section we have  

The structure of the aminosulphonate (sulphamate) ion, SO3NH2, has been accurately determined in the K salt, (i). Since the angles S—N-H and H—N—H are both 110° the N bonds are not coplanar, as suggested by an earlier X-ray study. We may include here two zwitterions. A n.d. study of sulphamic acid, 038. NH3, shows that the molecule has approximately the staggered configuration, (n). Of special interest are the N-H—O bonds (2-93-2-98 A) in which the N—H bond 

Details of the structures of tetrahedral ions and molecules (e)-(j) are given in Table 16.4 

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