Reaction of (R,R)-(N,N′)-Diisopropylcyclohexyl-1,2-diamine with beryllium chloride.: Crystal structures of (R,R,SN,SN′)-[(C12H26N2)BeCl2] and (R,R,SN,SN′)=[C12H26N2)BeCl(N3)]

(R,R)-(N,N')-diisopropylcyclohexyl-1,2-diamine reacts with equimolar amounts of BeCl2 in dichloromethane suspension to give the donor acceptor complex (R,R,S-N, S-N)-[(C12H26N2)BeCl2] (1). The reaction of 1 with excess trimethylsilylazide in dichloromethane solution leads to the formation of the azido derivative (R,R,S-N S-N')-[(C12H26N2)BeCl(N-3)] (2). Both complexes are characterized by X-ray diffraction and by IR spectroscopy. 1 center dot 0.5CH(2)Cl(2): Space group P6(1)22, Z = 6, lattice dimensions at 193 K: a = b = 1390.3(1), c = 1624.8(1) pm, R, = 0.0509. In the chiral complex I the BeCl2 unit forms a BeN2C2 chelate ring with Be-N distances of 199.8(4) pm. The molecules are associated via Cl center dot center dot H-N hydrogen bridges along [001]. 2: Space group P2(1), Z = 6, lattice dimensions at 193 K: a 1501.7(2), b = 968.6(2), c = 1629.2(4) pm, beta = 90.03(3)degrees, R-1 = 0.0981. The structure of 2 consists of three independent chiral units (R,R,S-N',S-N')-[(C12H26N2)BeCl(N-3)], which are associated via Cl center dot center dot center dot H-N and N-alpha center dot center dot center dot H-N hydrogen bridges along [100], N-alpha being N-alpha atoms of the azido groups.