Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Germanium complexes hypervalent

FIGURE 7. Molecular structure of a neutral hypervalent germanium(IV) complex. Reprinted with permission from Reference 12. Copyright 1997 American Chemical Society... [Pg.471]

Hypervalent compounds of organic germanium, tin and lead derivatives 1007 TABLE 14. X-ray data for pentacoordinate anions in chelate triphenyltin complexes... [Pg.1007]

The metalloid elements include boron, silicon, germanium, arsenic, antimony, tellurium, and astatine. Ligand exchange reactions complete much faster for silicon complexes when compared with carbon complexes because the silicon atom can form a hypervalent transition state that carbon cannot. [Pg.157]

By variation of the substitution pattern of the amidinate ligands and of the silicon or germanium coordination centers, we obtained a number of compounds with a variable degree of Si/Ge-N hypervalent interaction, i.e. compounds with essentially no bones and ones with very strong element-nitrogen bonds ( double bonds ) are formed, providing tetra-, penta- or hexa-coordinated species [4], New or newly structurally characterized examples of silicon amidinate complexes with pentacoordinate silicon are obtained (Eq. 1 Table 1). [Pg.271]

Hypervalent 10-electron structures are commonly observed in the compounds of germanium, tin, and lead (2002MI3). Representative examples of such heterocyclic compounds are illustrated by germanium cyclic oxa-mide complexes 27 (2009JCS(D)4695) and cyclic pentaorganostannate 28 (2007JA10974) shovm in Figure 6... [Pg.66]

Most classical hypervalent phosphoms-stabilized methanediide complexes of germanium [111, 112], tin, and lead [113] in their (+11) oxidation state are usually synthesized following either route B or intermediate route C. Most of the tin and lead complexes resulting from either route are dimeric, cyclic dimetalacyclobutanes, regardless of the steric bulkiness of the ligand (Scheme 35). [Pg.109]


See other pages where Germanium complexes hypervalent is mentioned: [Pg.1015]    [Pg.573]    [Pg.273]    [Pg.273]    [Pg.739]    [Pg.31]    [Pg.1047]    [Pg.1052]    [Pg.31]    [Pg.1015]    [Pg.1047]    [Pg.194]    [Pg.194]    [Pg.110]    [Pg.113]   
See also in sourсe #XX -- [ Pg.466 , Pg.467 , Pg.471 ]

See also in sourсe #XX -- [ Pg.466 , Pg.467 , Pg.471 ]




SEARCH



Germanium complexes

Hypervalence

Hypervalency

Hypervalent

© 2024 chempedia.info