Synthesis and characterization of palladium(II) complexes of thioureas. X-ray structures of [Pd(N,N′-dimethylthiourea)4]Cl2 · 2H2O and [Pd(tetramethylthiourea)4]Cl2

• Published in: Transition metal chemistry (Weinheim) Vol. 34; no. 2; pp. 197 - 202
• Main Authors: Nadeem, Shafqat, Rauf, Muhammad Khawar, Ahmad, Saeed, Ebihara, Masahiro, Tirmizi, Syed Ahmed, Bashir, Sarfaraz Ahmed, Badshah, Amin
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2009; Springer Nature B.V
• Subjects: Catalysis; Chemical analysis; Chemistry; Coordination; Crystallography; Infrared spectroscopy; Inorganic Chemistry; NMR spectroscopy; Organometallic Chemistry; Palladium; Physical Chemistry; Resonance; Thioureas; Thiourea; Palladium; Thione; Palladium Atom; K2PdCl4
• ISSN: 0340-4285; 1572-901X
• DOI: 10.1007/s11243-008-9177-5

Palladium(II) complexes of thiones having the general formula [Pd(L)
4
]Cl
2
, where L = thiourea (Tu), methylthiourea (Metu),
N
,
N
′-dimethylthiourea (Dmtu), and tetramethylthiourea (Tmtu) were prepared by reacting K
2
[PdCl
4
] with the corresponding thiones. The complexes have been characterized by elemental analysis, IR and NMR spectroscopy, and two of these, [Pd(Dmtu)
4
]Cl
2
 · 2H
2
O (
1
) and [Pd(Tmtu)
4
]Cl
2
(
2
), by X-ray crystallography. An upfield shift in the >C=S resonance of thiones in
13
C NMR and downfield shift in N–H resonance in
1
H NMR are consistent in showing sulfur coordination with palladium(II). The crystal structures of the complexes show a square-planar coordination environment around the Pd(II) ions with the average
cis
and
trans
S–Pd–S bond angles of 89.64° and 173.48°, respectively.