NaN3 type

Table 11.6 Burning rates of various types of NaN3 pyrolants at 7 MPa.

An addn compd with mercuric cyanide, Hg(CN)j.Zn(N3)a, which deflagrated but did not explode when heated,was prepd by Ricca Pirrone (Ref 10) from aq solns of NaN3, ZnS04 and Hg(CN)a. Strecker Schwinn (Ref 12) prepd some Zn azide complex salts, [ZnfCgHjN ] (N3)a and [Zn (CjH NHj), ] (N3)a, and detd their props. A group of mixed Zn halogen azides of the type [ZnNIaNa] M were prepd by Vournazos (Ref 8). 

In a subsequent paper, Diamantis et al.2536 have reported the synthesis of compounds of type [Ru(H edta)L ] [L = CO, NO etc. (n = 1) and L = RCN (n = 2)] by reaction of [Ru(Hedta)OH2] with the appropriate ligand in the presence of H2/Pt. The compounds were characterized by a range of spectroscopic techniques which indicate that the ligands L are accommodated in equatorial positions. For L = N2, the anions [Ru(edta)N2]2- and [ Ru(edta) 2N2]4 were isolated. The corresponding Na2[Ru(pdta)N2] 2H20 (H4pdta = propylenediaminetetraacetic acid) has been prepared from [Ru(Hptda)(OH2)] H2O and NaN3,2537... 

Table X shows results of reactions of 3-cyclohexyl-trans-2,3-epoxypropan-l-ol (8) with NaNs supported on various cation-exchanged Y-type zeolites, silica, and alumina, and with a mixture of MejSiNj and Ti(0 Pr)4 as a control experiment with a homogeneous system. Concerning the use of zeolite-supported NaNa, both the reactivity and regioselectivity in the synthesis of 8a/8b are greatly influenced by the type of cation in the zeolite NaNj on CaY showed the highest reactivity and selectivity (94%). It should be noted that the high performance with NaN3/CaY is superior to that with the homogeneous system of Me3SiN3-Ti(0 Pr)4 (31).

Lastly, it may seem somewhat bizarre to associate a safety device with an explosion but this is the method used to inflate air bags (Figure 1.2), If a vehicle is involved in a frontal collision equivalent to hitting a brick wall at more than 12 to 15 miles per hour, then sensors detect the sudden deceleration and trigger an electrical device which detonates a mixture containing about 65 g of sodium azide (NaN3). The azide undergoes a relatively slow type of explosion... 

Faecal streptococci are able to grow in the presence of sodium azide (NaN3), while many other types of bacteria are inhibited or killed by azide. Thus, by using culture mediums containing azide, it is possible to... 

Further azidation of PiBA-PS-PfBA was carried by an efficient substitution reaction of bromine groups with NaN3 in DMF for 36 h. The successful installation of two azide groups was reflected in the appearance of a N=N=N anti-symmetric stretch near 2,090 cm upon the conversion of Br-PfBA-PS-PfBA-Br to Ns-PfBA-PS-PfBA-Ns (Fig. 3.11). Thus, we successfully obtained Seesaw-type macromonomer Ns-PfBA-PS-PlBA-Ns with different block lengths. 

One significant limitations of both methods described above is that some types of donor-acceptor cyclopropanes such as the extensively studied 2-substituted cyclopropane-1,1-diesters are unable to produce the desired azides under then-conditions. In this regard, in 2015, Trushkov et al. developed a general and efficient method for ring-opening of various donor-acceptor cyclopropanes with NaN3 to synthesize a variety of polyfunctional azides (Scheme 6.27) [82]. The process proceeds with excellent regioselectivity and provides the products in moderate to... 

---