Synthesis and structure of organyl triphenylphosphonium dicyanoargentates: Ph3PR]+ [Ag(CN)2]-, R = CH2CH2NMe2, CH2CH2OH, Ph, CH2CH2CH2Br

With the use of potassium dicyanoargentate reaction with organic chlorophenylphosphonium chlorides in a water solution, the [Ph3PR]+[Ag(CN)2]- complexes have been synthesized; R = CH2CH2NMe2 (1), CH2CH2OH (2), Ph (3), CH2CH2CH2Br (4), which is established by the method of X-ray diffraction (XRD) analysis. Organyl triphenylphosphonium cations have a distorted tetrahedral configuration: the CPC angles equal 106.6(3)°-114.9(3)° (1), 106.56(9)-112.57(9)° (2), 105.4(3)°-111.94(19)° (3), 105.82(19)-112.0(2)° (4), the P-C distances are 1.798(5)-1.827(5) Å (1), 1.7901(17)-1.8101(19) Å (2), 1.793(5)-1.796(4) Å (3), 1.788(4)-1.811(4) Å (4). In the [Ag(CN)2]- anions the CAgC angles are 173.7(3)°, 174.2(3)° (1), 171.94(9)° (2), 177.0(4)° (3), 176.1(2)° (4), the Ag-C bonds are 2.106(8), 2.205(9) Å (1), 2.053(3), 2.203(3) Å (2), 2.078(9) Å (3), 2.094(7), 2.125(7) Å (4). According to the XRD data, carried out at 293 K on an automatic D8 Quest Bruker four-circle diffractometer (two-coordinate CCD detector, MoKa-radiation, l= 0,71073 Å, graphite monochromator), crystals 1 (C24H25AgN3P, M 988.62, triclinic syngony, crystal size 0.40 × 0.30 × 0.10 mm), 2 (C22H20AgN2OP, M 467.24, triclinic syngony, crystal size 0.78 × 0.77 × 0.35 mm), 3 (C26H20AgN2P, M 499.28, monoclinic syngony, crystal size 0.28 × 0.14 × 0.08 mm), 4 (C23H21AgBrN2P, M 544.17, monoclinic syngony, crystal size 0.44 × 0.27 × 0.18 mm). In crystals 1-4 there are cations of organyl triphenylphosphonium and monomeric dicyanoargentate anions. In crystal 1 two types of crystallographically independent cations and anions are observed, while in crystal 3 cations and anions are centrosymmetric. A feature of the complexes with the [Ag(CN)2]- anions is that they are promising in terms of creating new nano- and liquid-crystal systems.