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Research articles

ScienceAsia 48 (2022):ID 746-752 |doi: 10.2306/scienceasia1513-1874.2022.106


Synthesis and crystal structures of metal(I) bromide complexes containing 4-phenylthiosemicarbazide and triphenylphosphane ligands


Yupa Wattanakanjanaa,*, Kedkanok Mookdaa, Kantima Muangjeena, Arunpatcha Nimthong-Roldanb

 
ABSTRACT:     Two new mononuclear 4-phenylthiosemicarbazide complexes [Cu(4-PTSC)(PPh3 ) 2 ] Br (1) and [AgBr(4-PTSC)(PPh3 ) 2 ]?0.18H2O (2) [where PPh3 = triphenylphosphane and 4-PTSC = 4-phenylthiosemicarbazide] were synthesized and characterized by infrared spectroscopy and single crystal X-ray diffraction analysis. In the complexes, the 4-PTSC ligand acts in a monodentate fashion through the sulfur donor site to Ag(I) ion (in 2) or exhibits bidentate chelating coordination via the sulfur and the nitrogen being both bound to the Cu(I) ion (in 1). The structures exhibit distorted tetrahedral coordination around the metal ions. In the crystal of complex salt 1, the Br anions are not bonded to the metal and are linked the complex molecules via N?H???Br hydrogen bonds to form salt pair dimers (graph set motifs R1 2 (6) and D1 1 (2) combining to larger R2 4 (10) and R2 4 (14) motifs). In complex 2, where the bromide ion is bonded to the metal, intramolecular N?H???Br and N?H???N hydrogen bonds are observed (graph set motifs S1 1 (6) and S1 1 (5), respectively). The complex molecules of 2 are linked to form dimers via bifurcated N?H???Br hydrogen bonds involving the amine and bromide groups (graph set motif R4 4 (14)).

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a Division of Physical Science, Faculty of Science, Prince of Songkla University, Songkhla 90110 Thailand
b Pre-Development Sciences, 211, 2nd Ave, Waltham, Massachusetts 02451 USA

* Corresponding author, E-mail: yupa.t@psu.ac.th

Received 27 Nov 2021, Accepted 30 May 2022