2-C6H4

Halide complexes are also well known but complexes with nitrogen-containing ligands are rare. An exception is the blue phthalocyanine complex formed by reaction of Be metal with phthalonitrile, 1,2-C6H4(CN)2, and this affords an unusual example of planar 4-coordinate Be (Fig. 5.5). The complex readily picks up two molecules of H2O to form an extremely stable dihydrate, perhaps by dislodging 2 adjacent Be-N bonds and forming 2 Be-O bonds at the preferred tetrahedral angle above and below the plane of the macrocycle. 

Fig. 9 Transmission Eiectron Micrographs od sauper-structures resuiting from the seif-assembiy of 1.6 mm Pt particies stabiiizes haif by 4-HO-C6H4-SH and half by 4-NH-2-C6H4-SH a xlSOOO b xlOOOOO C x600000...

The nucleophilic displacement of the iodine moiety in 2-iodoben-zoates mediated by triphenyltin hydride and di-n-butyltin dichloride in aqueous solution has been demonstrated (Eq. 6.16).33 For example, 2-iodobenzoic acid reacts with a toluene solution of Ph3SnH/l,3-(N02)2 C6H4/aq. NaHC03 to give 89% yield of salicylic acid. 

Complexes with R = Me, Ph, Mes have been isolated and fully characterized including structural studies. As judged from the Au- -Au distances, the aurophilic interactions between the cations are at best very weak.222 Salts with the cations [(CyNC)2Au]+ and [(tBuNC)2Au]+ and the [(C6H4S2)2Au] anion were obtained in the reaction of the (RNC)AuCl complexes with dithiocatechol 1,2-C6H4(SH)2.223 The reaction of this dithiol with 2 equiv. each of... 

Fig. 20. (a) Structure of the dimeric subunits in [K C(SiMe3)2(C6H4-2-CH2NMe2)2 L (53) (b) sheet arrangement of the subunits in 53. Reproduced with permission from W. Clegg et al., Organometallics 1999,18, 2939. Copyright 1999, the American Chemical Society. 

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