Stibine-alane

Selected Bonding Parameters [pm, °] of Alane Stibine Adducts R3A1 <- SbR3... 

In contrast to these trends observed for borane-stibine adducts, the M-Sb bond lengths of alane-, gallane- and indane-stibine adducts are significantly elongated compared to the sum of the covalent radii (J>cov(AlSb) 266 J>cov(GaSb) 267 J>cov(InSb) 285 pm),48 as is expected for dative bonds. 

As already was observed for hypercoordinated adducts MX3(ER 3)2, no stibine and bismuthine adducts of low-valent alanes, gallanes or indanes have been prepared, to date. According to the lability of low-valent group 13 compounds toward disproportionation into M(III) and elemental M, stibines and bismuthines are expected to be too weak as Lewis bases, preventing them from the stabilization of such compounds. 

Stibinoalanes, 262-264, 266-268, 269 for AlSb film deposition, 301-303 see also Alane stibine adducts Stibinogallanes, 261-262, 269-272, 294-295 in film deposition, 303 Stibinoindanes, 261-262, 264, 272, 273 in film deposition, 303-304 Structure... 

Table 2 summarizes important structural parameters for alane-stibine and -bismuthine adducts R3A1-ER 3, while Table 3 features those for distibines and dibismuthines precursors R2E-ER 2 (E = Sb, Bi) and the corresponding alane adducts. 

Fig. 5 Coordination modes observed for alane-stibine, distibine, -bismuthine, and dibismuthine adducts...

Table 2 Selected bond lengths (A) and angles (°) for alane-stibine and alane-bismuthine adducts...

---