Binding sites between palladium(II) and nucleosides or nucleotides and crystal structure of [Pd(diethylenetriamine)(guanosine)](ClO4)2

1980 ◽  
Vol 58 (4) ◽  
pp. 381-386 ◽  
Author(s):  
F. D. Rochon ◽  
P. C. Kong ◽  
B. Coulombe ◽  
R. Melanson
Keyword(s):  
Crystal Structure ◽  
Binding Sites ◽  
Palladium Atom ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
R Factor ◽  
Square Planar ◽  
Purine Ring ◽  
Coordination Plane

The interactions between [Pd(dien)Cl]Cl and some nucleosides and nucleotides were studied by nmr. The binding site of guanosine, guanosinemonophosphoric acid, xanthosine, and inosine is N(7). Cytidine is coordinated to palladium through N(3). Adenosinemonophosphate acts as a bidentate, binding two different palladium atoms at N(1) and N(7).The crystal structure of [Pd(dien)(guanosine)](ClO4)2 has been determined by X-ray diffraction. The crystals are orthorhombic, space group P212121, with a = 13.422, b = 14.587, c = 12.432, and Z = 4. The structure was refined by block-diagonal least-squares analysis to a conventional R factor of 0.047 and a weighted Rw = 0.043. The coordination around the palladium atom is square planar. Guanosine is bonded to palladium through N(7). The planar purine ring makes an angle of 63.4° with the palladium coordination plane. The structure is stabilized by hydrogen bonding.

The molecular and crystal structure of [Pt(diethylenetriamine)(guanosine)](ClO4)2

1979 ◽  
Vol 57 (1) ◽  
pp. 57-61 ◽  
Author(s):  
R. Melanson ◽  
F. D. Rochon
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Least Squares ◽  
Platinum Atom ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
R Factor ◽  
Square Planar ◽  
Coordination Plane

The crystal structure of [Pt(diethylenetriamine)(guanosine)](ClO4)2 has been determined by X-ray diffraction. The crystals are orthorhombic, space group P212121, with a = 12.486(6), b = 13.444(7), c = 14.678(11) Å, and Z = 4. The structure was refined by block-diagonal least-squares analysis to a conventional R factor of 0.050 and a weighted Rw = 0.045.The coordination around the platinum atom is square planar. Guanosine is bonded to platinum through N(7). The purine planar ring makes an angle of 62.7° with the platinum coordination plane. The structure is stabilized by hydrogen bonding.

The molecular and crystal structure of trans-dichloro(dimethylformamide) (2,6-lutidine)platinum(II)

1980 ◽  
Vol 58 (2) ◽  
pp. 97-101 ◽  
Author(s):  
F. D. Rochon ◽  
P. C. Kong ◽  
R. Melanson
Keyword(s):  
Crystal Structure ◽  
Oxygen Atom ◽  
Least Squares ◽  
Pyridine Derivative ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Full Matrix ◽  
X Ray ◽  
R Factor ◽  
Square Planar

The crystal structure of trans-[Pt(DMF)(2,6-lutidine)Cl2] has been determined by X-ray diffraction. The crystals are orthorhombic, space group Pbca, with a = 11.612(13), b = 26.504(33), c = 9.271(9) Å, and Z = 8. The structure was refined by full matrix least-squares analysis to a conventional R factor of 0.051 and a weighted Rw = 0.044. The coordination around the platinum atom is square planar. The 2,6-lutidine ring is perpendicular to the platinum plane. DMF is bonded to platinum through the oxygen atom. It is planar and makes an angle of 71 ° with the platinum plane. The cis–trans configuration of the [Pt(DMF)(L)Cl2] (L = pyridine derivative) complexes in DMF solution is discussed.

Interaction between Acetyltetralone and Cu(II) Ions: X-Ray Diffraction of the Ligand and Single Crystal ESR Study of the Complex

1983 ◽  
Vol 38 (7) ◽  
pp. 830-834 ◽  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Structure Study ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Crystal Matrix ◽  
Present Complex ◽  
Square Planar

Abstract Single crystals of acetyltetralone grown from a solution containing a small amount of Cu(II) ions are studied by ESR. The corresponding g, 63Cu magnetic and quadrupolar hyperfine tensors are obtained and are consistent with the trapping of a square planar copper(II) complex. X-ray diffraction shows that pure acetyltetralone crystallizes in the orthorhombic space group Pbca (a - 8.893 Å, b = 20.301 Å, c = 10.715 Å). Comparison of the ESR eigenvectors with the bond directions obtained from this crystal structure study shows that the Cu(II) complex experiences some constraint from the crystal matrix. The present complex is a model for one of the complexation sites of tetracyclines.

Crystal Structure of Dibromo(η4-1,5-cyclooctadiene)palladium(II)

1996 ◽  
Vol 61 (9) ◽  
pp. 1335-1341 ◽  
Author(s):  
Petr Štěpnička ◽  
Ivana Císařová
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Single Crystal ◽  
Boat Conformation ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray ◽  
Square Planar ◽  
Twisted Boat

The crystal structure of [(η4-C8H12)PdBr2] has been determined by a single crystal X-ray diffraction with R = 3.82% for 2 147 independent diffractions. The compound crystallizes with the symmetry of orthorhombic space group P212121 (No. 19) within the following parameters: a = 7.0785(5) Å, b = 11.1896(9) Å, c = 12.514(1) Å, V = 991.2(1) Å3, Z = 4. The square planar arrangement of ligands around Pd(II) is distorted due to the steric requirements of 1,5-cyclooctadiene in a twisted boat conformation. Formula units are joined by the weak C2-H2...Br1(1 + x, y, z) hydrogen bonds.

Synthesis of aminoalcohol compounds of platinum and crystal structure of trans-[Pt(2-amino-2-methyl-1-propanol)2Cl2]

1984 ◽  
Vol 62 (12) ◽  
pp. 2657-2660 ◽  
Author(s):  
F. D. Rochon ◽  
P. C. Kong ◽  
R. Melanson
Keyword(s):  
Crystal Structure ◽  
Organic Ligand ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Full Matrix ◽  
X Ray ◽  
R Factor ◽  
Bonding System ◽  
Square Planar ◽  
Hydrogen Bonding System

Three types of complexes, trans-[Pt(LH)2Cl2], [Pt(L)2], and [Pt(LH)2(SR)2] where LH = NH2—C(CH3)2(CH2OH) and NH2—C(CH2OH)3 and L are the deprotonated ligands, have been synthesized.The crystal structure of trans-[Pt(NH2—C(CH3)2CH2OH)2Cl2] has been determined by X-ray diffraction methods. The crystals are monoclinic, space group P21/c, with a = 6,282(3), b = 20,901(13), c = 10,769(10) Å, β = 92,64(6)°, and Z = 4. The structure was refined by full-matrix least-squares analysis to a conventional R factor of 0.049 and Rw = 0.042. The coordination around the platinum atom is square planar. The Pt—Cl distances are 2.306(2) and 2.309(3) Å and the Pt—N bonds are 2.060(8) and 2.071 (7) Å. The hydroxyl oxygen atoms are disordered; the disorder is different for each organic ligand. The structure is stabilized by an extensive hydrogen bonding system.

Reactions of "cyclen-" and "cyclam-phosphorane" with [Pt2Cl4(PEt3)2]. Monodentate and bidentate complexes and the crystal and molecular structure of [PtCl(PEt3)(cyclamPH)]Cl•CH2Cl2

1989 ◽  
Vol 67 (1) ◽  
pp. 48-53 ◽  
Author(s):  
David Eric Berry ◽  
Jane Browning ◽  
Gordon William Bushnell ◽  
Keith Roger Dixon ◽  
Alan Pidcock
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Simple Formula ◽  
Crystal And Molecular Structure ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Nmr Studies ◽  
X Ray ◽  
Square Planar ◽  
Coordination Plane

Reaction of "cyclamphosphorane" (cyclamPH) with [Pt2Cl4(PEt3)2] yields [PtCl(PEt3)(cyclamPH)]Cl. The complex crystallizes as a dichloromethane solvate in the monoclinic space group P21/n, with a = 13.877(3), b = 23.231(7), c = 8.295(2)Å, β = 91.86(4)°, and an X-ray diffraction study shows square planar platinum coordination in which the labile proton of cyclamPH has transferred from phosphorus to nitrogen and the ligand is attached via simple [Formula: see text] chelation. The phosphorus is trans to chlorine in the platinum coordination plane.The corresponding product, trans-[PtCl2(PEt3)(cyclenPH2)]Cl, derived from reaction of "cyclenphosphorane" (cyclenPH) with [Pt2Cl4(PEt3)2], is shown by NMR studies to have a quite different structure in which the ligand is protonated at two nitrogen sites but not at phosphorus. The phosphorus is pentacoordinate with four attachments to nitrogen atoms and one to platinum. The two chlorine atoms are mutually trans in the platinum coordination plane. Keywords: crystal structure, cyclenphosphorane reaction, cyclamphosphorane reaction, X-ray diffraction.

scholarly journals Synthese und Kristallstruktur von (S4N3)2Se2Cl10, (S4N3)2Se2Cl6 und [(S4Ν3)SeSeCl5]n / Synthesis and Crystal Structure of (S4N3)2Se2Cl10, (S4N3)2Se2Cl6, and [(S4N3)SeCl5]n

1989 ◽  
Vol 44 (12) ◽  
pp. 1483-1487 ◽  
Author(s):  
Hans Georg Stammler ◽  
Johannes Weiss
Keyword(s):  
Crystal Structure ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
X Ray ◽  
Octahedral Environment ◽  
Square Planar ◽  
Distorted Octahedra

(S4N3)2Se2Cl10, (S4N3)2Se2Cl6 and [(S4N3)SeCl5]n are formed by the reaction of S4N4, Se2Cl2, and SOCl2. The structures of the three compounds where determined by X-ray diffraction. The yellow crystals of (S4N3)2Se2Cl,10 are monoclinic, space group P21/a, a = 817.5(2) pm, b = 1790.4(5) pm, c = 843.1(6) pm, β = 104.31(4)°, Z = 2. The Se2Cl,102- anion consists of 2 Cl-bridged distorted octahedra. (S4N3)2Se2Cl6 forms red monoclinic crystals, space group P21/c, a = 1036.5(3) pm, b = 1376.5(5) pm, c = 1400.4(4) pm, β = 100.65(2)°, Ζ = 4. In the Se2Cl62- anion the Se atoms have a square planar environment. The yellow crystals of (S4N3)SeCl5 are orthorhombic, space group P212121, a = 734.2(3) pm, b = 989.4(4) pm, c = 1627.4(6) pm, Z = 4. In the SeCl5- anion the Se atom has an octahedral environment of chlorine atoms, thus forming a polymeric structure.

Crystal structure of the ferromagnetic polymer potassium Bis(carbonato)cuprate(II)

1980 ◽  
Vol 33 (2) ◽  
pp. 431 ◽  
Author(s):  
A Farrand ◽  
AK Gregson ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Least Squares ◽  
Title Compound ◽  
Three Dimensional ◽  
The Other ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Square Planar

The crystal structure of the title compound, K2Cu(CO3)2, has been determined by single-crystal X-ray diffraction at 295(1) K, and refined by least squares to a residual of 0.027 for 1441 'observed' reflections. Crystals are orthorhombic, space group Fdd2, a 11.425(3), b 17.658(4), c 6.154(2) A, Z 8. The structure comprises potassium cations embedded in an infinite three-dimensional polymeric anionic array of square-planar coordinated copper atoms with bridging carbonate groups [Cu-O 1.934(2), 1.936(2) Ǻ]. Within the latter, the non- coordinating oxygen-carbon bond is shorter [1.259(3) Ǻ] than the other two [1.303(3), 1.307(2) Ǻ] and the O-C-O angle opposite it is correspondingly reduced to 117.1(2)°. The CO3 plane lies at 83.9° to the CuO4 'plane'.

Synthesis of complexes of the type cis-Pt(amine) (unsaturated ligand)Cl2 and crystal structure cis-Pt(methylaimne) (dimethylhexynediol)Cl2

1989 ◽  
Vol 67 (12) ◽  
pp. 2209-2212 ◽  
Author(s):  
F. D. Rochon ◽  
R. Melanson ◽  
Monique Doyon
Keyword(s):  
Crystal Structure ◽  
Platinum Complexes ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Methyl Derivative ◽  
Full Matrix ◽  
X Ray ◽  
H Nmr ◽  
R Factor ◽  
Square Planar

Complexes of the type cis-Pt(L)(un)Cl2 where L = primary amine or methyl derivative of pyridine and un = cyclopentene, cyclohexene, or dimethylhexynediol, have been synthesized from the reaction of K[Pt(L)Cl3] with the unsaturated ligand in water. The compounds were characterized and studied by 1H NMR and IR spectroscopy. The crystal structure of cis-Pt(CH3NH2)((CH3)2C(OH)—C≡C—C(OH)(CH3)2)Cl2 was determined by X-ray diffraction methods. The crystals are monoclinic, space group P21/c, with a = 6.544(2), b = 14.304(7), c = 15.508(7) Å, β = 109.39(2)°, and Z = 4. The coordinates and the anisotropic thermal factors were refined by full-matrix least-squares analysis to a R factor of 0.048 and wR = 0.047. The coordination around the platinum atom is square planar and the acetylenic ligand is perpendicular to the Pt plane. Keywords: platinum complexes, crystal structure, methylamine, dimethylhexynediol, synthesis.

scholarly journals β-Y(BO2)3 – a new member of the β-Ln(BO2)3 (Ln=Nd, Sm, Gd–Lu) structure family

2017 ◽  
Vol 72 (12) ◽  
pp. 983-988 ◽  
Author(s):  
Martin K. Schmitt ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray

Abstractβ-Y(BO2)3 was synthesized in a Walker-type multianvil module at 5.9 GPa/1000°C. The crystal structure has been elucidated through single-crystal X-ray diffraction. β-Y(BO2)3 crystallizes in the orthorhombic space group Pnma (no. 62) with the lattice parameters a=15.886(2), b=7.3860(6), and c=12.2119(9) Å. Its crystal structure will be discussed in the context of the isotypic lanthanide borates β-Ln(BO2)3 (Ln=Nd, Sm, Gd–Lu).

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