Dichlorido(10,11,12,13-tetra­hydro-4,5,9,14-tetra­azabenzo[b]triphenyl­ene)cadmium(II) hemihydrate

In the title compound, [CdCl2(C18H14N4)2]·0.5H2O, the Cd atom assumes a distorted octa­hedral trans-CdCl2N4 geometry arising from its coordination by two N,N′-bidentate 10,11,12,13-tetra­hydro-4,5,9,14-tetra­azabenzo[b]triphenyl­ene (TBBT) mol­ecules and two chloride ions. In the crystal, π–π aromatic stacking inter­actions between adjacent TTBT rings are seen, with a centroid–centroid distance of 3.604 (3) Å. An O—H⋯Cl hydrogen bond between the half-occupied water molecule and one chloride ion also occurs

Bis(imidazo[4,5-f][1,10]phenanthroline)dinitratolead(II)

In the title compound, [Pb(NO3)2(C13H8N4)2], the PbII atom (site symmetry 2) is hexa­coordinated by four N atoms from two N,N′-bidentate imidazo[4,5-f][1,10]phenanthroline (L) ligands and two O atoms from two weakly coordinated nitrate ions [Pb—O = 2.872 (5) Å] in an irregular arrangement, which may be ascribed to the stereochemically active lone pair of electrons on the metal ion. In the crystal, inter­molecular bifurcated N—H⋯(O,O) hydrogen bonds connect the mol­ecules into chains propagating along [100]. Adjacent chains inter­act by strong aromatic π–π stacking inter­actions, with a centroid–centroid distance of 3.483 (2) Å

Higher-order effects on the incompressibility of isospin asymmetric nuclear matter

Analytical expressions for the saturation density as well as the binding energy and incompressibility at the saturation density of asymmetric nuclear matter are given exactly up to 4th-order in the isospin asymmetry delta =(rho_n - rho_p)/rho using 11 characteristic parameters defined at the normal nuclear density rho_0. Using an isospin- and momentum-dependent modified Gogny (MDI) interaction and the SHF approach with 63 popular Skyrme interactions, we have systematically studied the isospin dependence of the saturation properties of asymmetric nuclear matter, particularly the incompressibility $K_{sat}(\delta )=K_{0}+K_{sat,2}\delta ^{2}+K_{sat,4}\delta ^{4}+O(\delta ^{6})$ at the saturation density. Our results show that the magnitude of the high-order $K_{sat,4}$ parameter is generally small compared to that of the K_{\sat,2} parameter. The latter essentially characterizes the isospin dependence of the incompressibility at the saturation density and can be expressed as $K_{sat,2}=K_{sym}-6L-\frac{J_{0}}{K_{0}}L$, Furthermore, we have constructed a phenomenological modified Skyrme-like (MSL) model which can reasonably describe the general properties of symmetric nuclear matter and the symmetry energy predicted by both the MDI model and the SHF approach. The results indicate that the high-order $J_{0}$ contribution to $K_{sat,2}$ generally cannot be neglected. In addition, it is found that there exists a nicely linear correlation between $K_{sym}$ and $L$ as well as between $J_{0}/K_{0}$ and $K_{0}$. These correlations together with the empirical constraints on $K_{0}$, $L$, $E_{sym}(\rho_{0})$ and the nucleon effective mass lead to an estimate of $K_{sat,2}=-370\pm 120$ MeV.Comment: 61 pages, 12 figures, 6 Tables. Title changed a little and results of several Skyrme interactions updated. Accepted version to appear in PR

10,11,12,13-Tetrahydro-4,5,9,14-tetra­azadibenz[a,c]anthracene–benzene-1,4-dicarboxylic acid (2/1)

In the title adduct, 2C18H14N4·C8H6O4, the centrosymmetric 1,4-benzene­dicarboxylic acid mol­ecule makes two O—H⋯·N hydrogen bonds to adjacent 10,11,12,13-tetra­hydro-4,5,9,14-tetra­azadibenzo[a,c]anthracene (TTBT) mol­ecules. Aromatic π–π stacking inter­actions occur between TTBT rings [centroid–centroid distance = 3.570 (3) Å], leading to a two-dimensional supra­molecular structure in the crystal

catena-Poly[[aqua­(dipyrido[3,2-a:2′,3′-c]phenazine-κ2 N 4,N 5)iron(II)]-μ-pyrazine-2,3-dicarboxyl­ato-κ3 N 1,O 2:O 3]

In the title compound, [Fe(C6H2N2O4)(C18H10N4)(H2O)]n, the FeII ion adopts a slightly distorted octahedral mer-FeN3O3 geometry, arising from one N,N′-bidentate dipyrido[3,2-a:2′,3′-c]phenazine ligand, one N,O-chelating pyrazine-2,3-dicarboxyl­ate dianion and one water mol­ecule. An O-bonded symmetry-related dianion completes the coordination of the metal. The bridging dianion results in a one-dimensional polymeric chain. Aromatic π–π stacking inter­actions between ligands [centroid–centroid separations = 3.528 (2) and 3.741 (2) Å] and O—H⋯O and O—H⋯N hydrogen bonds link the chains together, leading to a three-dimensional supra­molecular network

catena-Poly[[aqua­(pyrazino[2,3-f][1,10]phenanthroline-κ2 N 8,N 9)cobalt(II)]-μ-pyrazine-2,3-dicarboxyl­ato-κ3 N 1 O 2:O 3]

In the title compound, [Co(C6H2N2O4)(C14H8N4)(H2O)]n, the Co atom is bonded to one N,N′-bidentate pyrazino[2,3-f][1,10]phenanthroline (Pyphen) ligand, one N,O-bidentate pyrazine-2,3-dicarboxyl­ate (PZDC) dianion and one water mol­ecule in a distorted octa­hedral mer-CoN3O3 geometry. The CoII atoms are bridged by the PZDC dianions, forming an infinite one-dimensional chain running along the b axis. Adjacent chains pack together through π–π stacking inter­actions [centroid–centroid separations = 3.498 (4) and 3.528 (4) Å], and O—H⋯O and O—H⋯N hydrogen bonds involving the water mol­ecule complete the structure

Poly[[(μ-benzene-1,4-dicarboxyl­ato)bis­[μ-4-(1H-1,3,7,8-tetra­aza­cyclo­penta­[l]phenanthren-2-yl)benzoato]dizinc] tetra­hydrate]

In the title complex, [Zn2(C8H4O4)(C20H11N4O2)2]·4H2O, the ZnII atom is six-coordinated by two carboxyl­ate O atoms from one bidentate benzene-1,4-dicarboxyl­ate (1,4-BDC) ligand, two carboxyl­ate O atoms from two different monodentate 4-(1H-1,3,7,8-tetra­aza­cyclo­penta­[l]phenanthren-2-yl)benzoate (HNCP) ligands and two HNCP N atoms. The ZnII atoms are bridged by the centrosymmetric 1,4-BDC ligands, forming an extended single-chain structure. Neighbouring single chains are connected by the HNCP ligands from two opposite directions, resulting in a sheet. In addition, there are N—H⋯O hydrogen-bonding inter­actions between adjacent layers. As a result, the polymeric sheets are further extended into a three-dimensional supra­molecular structure

Poly[[tri-μ3-hydroxido-tris­(μ4-pyridine-2,5-dicarboxyl­ato)trineodymium(III)] monohydrate]

In the title compound, {[Nd3(C7H3NO4)3(OH)3]·H2O}n, the NdIII atom is eight-coordinated by the three O atoms of three asymmetrically μ3-bridging hydroxide groups, by four carboxyl­ate O atoms of four different pyridine-2,5-dicarboxyl­ate (2,5-pydc) ligands, and by the N atom of a 2,5-pydc ligand. Six Nd atoms are connected by six hydroxide groups, forming an [Nd6(μ3-OH)6] cluster unit of symmetry -3 and a slightly compressed octa­hedral geometry. Adjacent [Nd6(μ3-OH)6] clusters are connected by the 2,5-pydc ligands, via O and N atoms, forming chains along the c axis. The remaining O atoms of the 2,5-pydc ligands link these chains into a three-dimensional framework. A disordered water molecule, located on a threefold rotation axis at the opposite side of the [Nd6(μ3-OH)6] cluster and exposed to each of the three Nd atoms, completes the structure

Case Report Metastatic Prostate Adenocarcinoma Posing as Urothelial Carcinoma of the Right Ureter: A Case Report and Literature Review

This is a case report of a 67-year-old patient with distant metastasis of prostate cancer to the right ureter which caused hydronephrosis. At the beginning, both of the cytology of the morning urine and imaging findings were consistent with urothelial carcinoma. Nephroureterectomy was subsequently performed. Interestingly, the pathological examination of the excised ureter revealed that the malignancy was derived from the prostate. No skeletal metastasis was detected. However, after four months of follow-up, several abnormal signal shadows were reported in skeletal scintigraphy and the prostate specific antigen (PSA) was gradually increasing. We present such a case for its unique presentation. A review of the literature is also provided