Selenolato complexes

A monomeric selenolato complex of zinc (65) was synthesized with a chelating oxazoline ligand.587 The complex was characterized by X-ray crystal structure, 1H, 13C, and 77Se NMR. These studies demonstrate that the compound is helically chiral and solution studies appear to show retention of chirality in solution. The zinc complex is tetrahedral with a Zn—Se average bond length of 2.378(1) A. 

However, situations where more weakly coordinating ligands such as Et20 (144) are present or where less than stoichiometric amounts (3 equiv) of thf are used (146), already lead to the formation of dimeric aggregates of the type [Li(SAr)L]2 (Fig. 18). Similarly, polynuclear lithium areneselenolates [Li(SeAr)] react with bpy to afford dimeric aggregates [Li(SeAr)(bpy)]2 (32). A trimeric structure, for which details were not reported, has very recently been found for the thiolato mono thf complex [Li(thf)(SC6H2-t-Bu3-2,4,6)]3 (154) the structure of the analogous selenolato complex is also trimeric (155). 

Several years later, Kanatzidis et al. reported the preparation of hetero-binuclear complexes of tetrahedrally arranged Cu and In centers, with two bridging thiolato or selenolato groups, [ PPh3 2Cu(p-QEt)2In(SEt)2], (Q = S or Se) (i.e., equation 6.3).38 Pyrolysis studies undertaken revealed that the Se derivative could be converted into CuInSe2 at 400-450 °C at 0.01 mm Hg (see equation 6.4). However, none of the precursors had been evaluated in a thin-film deposition study. 

ARENE THIOLATO, SELENOLATO, AND TELLUROLATO COMPLEXES OF MERCURY... 

In the case of dithiolato Pt(II) complex, lra s-Pt(SAr)2(PPh3)2, Kuniyasu and Kambe succeeded in the observation of stepwise double insertion of terminal alkynes followed by reductive elimination to give (Z,Z)-l,4-diarylthio-l,4-disub-stituted-1,3-butadienes [49,50]. They also obtained (2-chalcogenovinyl)-selenolato Pt(II) [51] and Pd(II) complexes [52] by other methods. 

Ishii and coworkers investigated stoichiometric reaction of hydrido-selenolato Pt (II) complexes, ds-PtH(SeTrip)(PPh3)2 (43) (Trip = 9-triptycyl), with alkynes [53]. The hydrido-selenolato Pt(II) complex 43 is obtained by the reaction of TripSeH with Pt(C2H4)(PPh3)2 (23) [54]. 

Ishii A, Kamon H, Murakami K, Nakata N (2010) Hydroselenation and carboseienation of electron-deficient alkynes with isolable (hydrido)(selenolato)platinum(lI) complexes and a selenaplatinacycle bearing a triptycene skeleton. Eur J Org Chem 1653-1659... 

Ishii A, Nakata N, Uchiumi R, Murakami K (2008) Reactions of a ditriptycyl-substituted selenoseleninate and related compounds with a platinum(O) complex formation of selenaplatinacycle and hydrido selenolato platinum(II) complexes. Angew Chem Int Ed 47 2661-2664... 

Nakata N, Yoshino T, Ishii A (2010) Synthesis and properties of hydrido(selenolato)platinnm (II) complexes bearing chelating phosphine ligands. Phosphorus Sulfur Silicon Relat Elem 185 992-999... 

Ishii A, Yamaguchi Y, Nakata N (2010) Thermal reaction of a (hydrido)(selenolato)platinnm (II) complex having a dibenzobarrelenyl group leading to three cyclometalations. Dalton Trans... 

Nakata N, Yamaguchi Y, Ishii A (2010) Synthesis and thermal reaction of hydrido(selenolato) platinum(II) complex having a 9,10,11,12,14,15-hexahydro-9,10[3, 4 ]-furanoanthiacenyl group. J Organomet Chem 695 970-973... 

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