Structures of copper(I) and zinc(II) complexes with N,N '-bis(2-pyridinyl)thiourea (BPT)

Copper(I) and zinc(II) complexes with N,N'-bis(2-pyridinyl)thiourea (BPT), [Cu(BPT)(2)]ClO4 (1) and [Zn(BPT)(2)](ClO4)(2) (2) were synthesized by reac tion of M(ClO4)(2) (M=Cu,Zn) with BPT in methanol solution. The crystal str uctures of complexes (1) and (2) were characterized by X-ray diffraction: ( 1) is triclinic, space group P (1) over bar, with a=10.162(2), b=14.483(6), c=9.496(2)Angstrom, alpha=105.80(2)degrees, beta=106.94(2)degrees, gamma=8 2.71(3)degrees, V=1284.4(7)Angstrom(3), Z=2, and final R=0.047, R-w=0.061; (2) is monoclinic, space group C2/c, with a=15.15(1), b=6.299(3), c=30.16(1 )Angstrom, beta=93.49(7)degrees, V=2872(2)Angstrom(3), Z=4, and final R=0.0 49, R-w= 0.070. Both of the complexes exhibit novel structures. Two N atoms and two S atoms from two BPT groups coordinate to one M atom. The M atom s hows distorted tetrahedral geometry. IR spectra and thermoanalyses of BPT a nd its complexes (1) and (2) are briefly discussed.