TY - JOUR
T1 - The crystal structure and thermal stability of [bis-picrate(pentaethylene glycol)] praseodymium(III)picrate complex
AU - Saleh, Muhammad I.
AU - Kusrini, E.
AU - Adnan, R.
AU - Rahman, Ismail A.
AU - Saad, B.
AU - Usman, A.
AU - Fun, H. K.
AU - Yamin, B. M.
N1 - Funding Information:
The authors would like to thank the Malaysian Government, Universiti Sains Malaysia and Universiti Kebangsaan Malaysian for the research grants IRPA No. 305/PKIMIA/612906, FRGS No. 304/PKIMIA/670006 and 09-02-02-0016, respectively.
PY - 2005/6
Y1 - 2005/6
N2 - [Bis-picrate(pentaethylene glycol)]praseodymium(III) picrate, [Pr(pic)·(EO5]+[pic]-, was successfully obtained from the reaction of praseodymium nitrate hexahydrate, picric acid and pentaethylene glycol in acetonitrile-methanol as solvent. The crystal system is monoclinic with space group P21/c, a = 18.91419(11) Å, b = 9.0470(6) Å, c = 24.1209(14) Å and α = γ = 90°, β = 109.07(1)°, V = 3880.3(4) Å3 and Z = 4. The Pr atom is coordinated to the flexible and open EO5 ring via all the six oxygen atoms and two picrate ligands, one via phenoxo oxygen atom and the other one with both phenoxo and nitro oxygen atoms in a bidentate manner resulting a 9-coordinate tricapped trigonal prismatic geometry. The two picrate ligands coordinated to the Pr atom are at the opposite sides of the hexadentate EO5 ring with phenyl fragments almost perpendicular with dihedral angle of 89.7(3)°. Thermal analysis results show that the complex is stable up to 100°C when it began to slowly decompose and followed by an explosive decomposition at 290°C.
AB - [Bis-picrate(pentaethylene glycol)]praseodymium(III) picrate, [Pr(pic)·(EO5]+[pic]-, was successfully obtained from the reaction of praseodymium nitrate hexahydrate, picric acid and pentaethylene glycol in acetonitrile-methanol as solvent. The crystal system is monoclinic with space group P21/c, a = 18.91419(11) Å, b = 9.0470(6) Å, c = 24.1209(14) Å and α = γ = 90°, β = 109.07(1)°, V = 3880.3(4) Å3 and Z = 4. The Pr atom is coordinated to the flexible and open EO5 ring via all the six oxygen atoms and two picrate ligands, one via phenoxo oxygen atom and the other one with both phenoxo and nitro oxygen atoms in a bidentate manner resulting a 9-coordinate tricapped trigonal prismatic geometry. The two picrate ligands coordinated to the Pr atom are at the opposite sides of the hexadentate EO5 ring with phenyl fragments almost perpendicular with dihedral angle of 89.7(3)°. Thermal analysis results show that the complex is stable up to 100°C when it began to slowly decompose and followed by an explosive decomposition at 290°C.
KW - Lanthanide
KW - PEG
KW - Pentaethylene glycol
KW - Picrate complex
KW - Praseodymium complex
UR - http://www.scopus.com/inward/record.url?scp=21644441213&partnerID=8YFLogxK
U2 - 10.1007/s10870-005-2222-8
DO - 10.1007/s10870-005-2222-8
M3 - Article
AN - SCOPUS:21644441213
SN - 1074-1542
VL - 35
SP - 469
EP - 475
JO - Journal of Chemical Crystallography
JF - Journal of Chemical Crystallography
IS - 6
ER -