Aluminum-magnesium complex

Figure 53 The structure of the ethynyl-bridged aluminum-magnesium complex [Me2AI(/i-EtN)2Mg(/j-Cs=CPh)]2 106.

Amidino-bridged mixed aluminum-magnesium complexes are obtained in the reaction of Al-Mg complexes with carbodiimides. ... 

Aluminum-magnesium complex) (Lowsium, Riopan, Riopan Plus)... 

Chang CC, Liao MC, Chang TH, Peng SM, Lee GH (2005) Aluminum-magnesium complexes with linear bridging carbon dioxide. Angew Chem Int Ed 44 7418-7420... 

There are other metal complexes, such as tin, aluminum, magnesium, iron, cobalt, titanium, and vanadium complexes, which are similarly useful in stabilizing a particular phthalocyanine modification. Moreover, carboxy, carbonamido, sulfo, or phosphono-copper phthalocyanine may be admixed during fine dispersion of the pigment. 

Mono- and diammonium phosphate are used as solid fertilizers, whereas ammonium polyphosphate is mainly utilized in solution as a liquid fertilizer, since unlike the orthophosphates, it is very soluble and is more difficult to granulate than the orthophosphates. As a result of its complexing properties, it also keeps impurities (iron, aluminum, magnesium etc.) in solution. 

Organomagnesium compounds show less tendency than organolithium compounds to form the cationic part of ate complexes (but see, for example, the cobalt example in Table 16.1). Indeed, even with aluminum the complexes are probably better regarded as mixed aggregates, for example Mg2Al2(CH,) [70] and the volatile complexes [(n-C4H,)2MgAl(OR)3]2 [71], It should also be noted that magnesium can also participate in the anionic part of ate complexes (see Section 3.3.3). 

Several metallic species other than titanium have been reported. Kobayashi showed that the tin(II) complex (16, Fig. 4) modified by cinchonine, a natural alkaloid, catalyzed the reaction to give the chiral cyanohydrin of cyclohexanecar-baldehyde in 90% ee [54]. Corey applied a magnesium complex of chiral bisox-azoline (17, Fig. 4) to the asymmetric silylcyanation. High selectivity of up to 95% ee was observed in the reactions of aliphatic aldehydes compared with benzaldehyde (52% ee) [55]. An aluminum complex of a peptide containing the phenolic Schiff base (7) was shown by Mori and Inoue to be an efficient catalyst for the addition of TMSCN to aldehydes [56,57]. 

Definition Complexation prod, of stearic acid with aluminum/magnesium hydroxide Uses Emulsion stabilizer in cosmetics... 

Uses Colorimetry (copper determination) complexing agent oxidation inhibitor in ethyl ether corrosion inhibitor in industrial water treatment aluminum/magnesium chromatizing treatments... 

The insertion of isothiocyanates into Mg-C bonds in polynuclear aluminum-magnesium compounds , into Si-S bonds in mthenium complexes , intoMo-OR andRh-OR bonds in carbonyl complexes and into diiron-hydride complexes has also been observed. Also, insertion of EtOCONCS into the rhenium-rhenium bond of Re2(CO)9(NCMe) is... 

This was exercised with ester 266. The magnesium complex formed in the Grignard reaction was stereoselectively reduced with lithium borohydride while the aldehyde-aluminum complex formed in the low temperature DIBAL reduction is also stereoselectively attacked by the Grignard reagent [102]. 

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