Compounds Containing M-Group 16 Element Bonds

Me3Si) though the planar In2AsP ring is disordered with respect to As, P. A further example of a 15-17 bridged dimer has been reported, namely cycio-[ (Neo) 2ln ()i-AsR2) In (Neo) 2 (M- C1) ] (R = 

Me3Si), in which the central ring is puckered (In-Cl 261pm). 

The structure of planar [ Bu2Ga (ji-PHBu ) ] 2 has also appeared, though unusually this was found to co-crystallise with -BU4P4.  

Me2AlCl and Li(NC4Me4)/Li(butanide) have been shown to form the chlorine-bridged anion [ [Me2Al ( MC4Me4) )2 (M- C1) ] (Al-N 190.5 Al-Cl 233.5pm) which complexes the associated lithium 

The heterocycle (47) is formed from R2AIAIR2 (R =bis see Section 2.1) and (Me2P)2CBLi inTMEDA. The ring is bent with phosphorus 

3 Compounds Containing M-Group 16 Element Bonds.- Reviews which will be of interest to the reader cover the reaction of Group 13 metal alkyls with O2 and the chalcogens,the alkoxides, thiolates and heavier Group 16 derivatives,and liquid clathrates based on anionic and cationic organoaluminiurns or aluminoxanes. 

Rather different products result from the use of diphosphines, for example dppe requires two equivalents of peroxide dimer and yields the asymmetric dimer ( BU2Ga) ()l-OBu ) ( i-OOBu ) (GaBu2 ) and dppe02. In contrast, dppm yields not the phosphine oxide but (46), in which deprotonated dppm02 acts as a bidentate ligand analogous to a p-diketonate. 

Several reports have dealt with the synthesis of M-O-Si species. [Me2A10Si(H)Me2]2 been prepared from either X2A10Si (H)M62 and MeLi (X = Cl, Br), or Me2AlCl and [Me2 (H) Si] 2O with elimination of Me2 (H) SiCl. Similar methodology using [H2(R)Si]20 has led to the isolation of [Me2AlOSi(R)H2]n = 

CS2 has been found to insert into the central bond of R2AIAIR2 (R = Bis), to give both monomeric (R2AD2S and the dithiocarboxylate-like R2AICS2AIR2, both crystallographically characterised. The sulphide incorporates an open angle at the chalcogen (117.5°), presumably a result of the associated short Al-S bond (218.7pm) 

3 Compounds Containing M-Group 16 Element Bonds.- Of general interest is a structural survey of organoaluminium derivatives 

The synthesis of 1 1 adducts of RAICI2 with various ethers. 

The Al-O bond to the central oxygen is shorter [178(1) pm) than to the terminal ones [219.6(l)pm), resulting in the central, nominally C=0 being as long as the C-0 single bonds (134pm) 

2-di (hydroxymethyl)benzene (H2L) reacts with three equivalents ofMe3Al to give L2Al3Me5, which NMR data suggests contains a 

Clln[ CH2) 3NMe2l2 been reacted with both Na02CCF3 and LiOCgF5 to give the intramolecularly base-stabilised indium fluorocarboxylate or fluorophenol.  

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