Color-coded summation images in the evaluation of renal artery stenosis before and after percutaneous transluminal angioplasty.

Background: Endovascular therapy is the gold standard in patients with hemodynamic relevant renal artery stenosis (RAS) resistant to medical therapy. The severity grading of the stenosis as well as the result assessment after endovascular approach is predominantly based on visible estimations of the anatomic appearance. We aim to investigate the application of color-coded DSA parameters to gain hemodynamic information during endovascular renal artery interventions and for the assessment of the procedures´ technical success.

The Triple-Decker Complex [Cp*Fe(µ,η⁵:η⁵-P₅)Mo(CO)₃] as a Building Block in Coordination Chemistry.

Although the triple-decker complex [Cp*Fe(µ,η⁵:η⁵-P₅)Mo(CO)₃] () was first reported 26 years ago, its reactivity has not yet been explored. Herein, we report a new high-yielding synthesis of and the isolation of its new polymorph (). In addition, we study its reactivity towards Ag and Cu ions.

Organometallic-Organic Hybrid Polymers Assembled from Pentaphosphaferrocene, Bipyridyl Linkers, and Cu Ions.

A multicomponent approach of the P ligand complex [Cp*Fe(η-P)] (: Cp* = η-CMe) with the ditopic organic linkers 4,4'-bipyridine () or -1,2-di(pyridine-4-yl)ethene () in the presence of Cu salts of the anions [BF] and [PF] or the coordinating anion Br, leads to the formation of four novel organometallic-organic hybrid polymers: the cationic 1D polymeric compounds [Cu{Cp*Fe(µ,η-P)}(µ,η-CHN)(CHCN)] [BF] () and [Cu{Cp*Fe(µ,η-P)}(µ,η-CHN)(CHCN)] [PF] () as well as the unique neutral threefold 2D → 2D interpenetrated networks [CuCl{Cp*Fe(µ,η-P)}(µ,η-CHN)] () and [CuBr{Cp*Fe(µ,η-P)}(µ,η-CHN)] ().

Dicationic E Chains (E=P, As, Sb, Bi) Embedded in the Coordination Sphere of Transition Metals.

The oxidation chemistry of the complexes [{CpMo(CO) } (μ,η :η -E )] (E=P (A), As (B), Sb (C), Bi (D)) is compared. The oxidation of A-D with [Thia] (=[C H S ] ) results in the selective formation of the dicationic E complexes [{CpMo(CO) } (μ ,η :η :η :η -E )] (E=P (1), As (2), Sb (3), Bi (4)), stabilized by four [CpMo(CO) ] fragments. The formation of the corresponding monocations [A] , [C] , and [D] could not be detected by cyclic voltammetry, EPR, or NMR spectroscopy.

Highly dynamic coordination behavior of Pn ligand complexes towards "naked" Cu(+) cations.

Reactions of Cu(+) containing the weakly coordinating anion [Al{OC(CF3 )3 }4 ](-) with the polyphosphorus complexes [{CpMo(CO)2 }2 (μ,η(2) :η(2) -P2 )] (A), [CpM(CO)2 (η(3) -P3 )] (M=Cr(B1), Mo (B2)), and [Cp*Fe(η(5) -P5 )] (C) are presented. The X-ray structures of the products revealed mononuclear (4) and dinuclear (1, 2, 3) Cu(I) complexes, as well as the one-dimensional coordination polymer (5 a) containing an unprecedented [Cu2 (C)3 ](2+) paddle-wheel building block. All products are readily soluble in CH2 Cl2 and exhibit fast dynamic coordination behavior in solution indicated by variable temperature (31) P{(1) H} NMR spectroscopy.

Complexes of monocationic Group 13 elements with pentaphospha- and pentaarsaferrocene.

Reactions of the sandwich complexes [Cp*Fe(η(5)-E5)] (Cp*=η(5)-C5Me5; E=P (1), As (2)) with the monovalent Group 13 metals Tl(+), In(+), and Ga(+) containing the weakly coordinating anion [TEF] ([TEF]=[Al{OC(CF3)3}4](-)) are described. Here, the one-dimensional coordination polymers [M(μ,η(5):η(1 -E5 FeCp*)3]n [TEF]n (E=P, M=Tl (3 a), In (3 b), Ga (3 c); E=As, M=Tl (4 a), In (4 b)) are obtained as sole products in good yields. All products were analyzed by single-crystal X-ray diffraction, revealing a similar assembly of the products with η(5)-bound E5 ligands and very weak σ-interactions between one P or As atom of the ring to the neighbored Group 13 metal cation.

Simultaneous end-on/side-on coordination modes of a diphosphorus tetrahedral complex imposed by pre-organization of oligometallic Cu(I) acceptors.

The reaction of the [{CpMo(CO)(2)}(2)(μ,η(2):η(2)-P(2))] (Cp=cyclopentadienyl) metallo-ligand 2 with pre-organized Cu(I) bi- and trimetallic precursors afforded new coordination complexes with unprecedented coordination modes for a Mo(2)P(2) complex. Variable-temperature solution and solid-state (31)P NMR spectroscopy measurements were performed and X-ray diffraction studies revealed an η(2):η(1) coordination mode for the Mo(2)P(2) unit of 2 in the Cu(I) bimetallic complexes 3 and 4. DFT calculations were carried out to highlight the bonding situation of this unprecedented coordination mode in the Cu(I) bimetallic compound 3.

Mono-, di- and polymetallic TlI complexes stabilized by a 2,5-bis(2-pyridyl)-1-phenyl-phosphole ligand.

Depending on the nature of the counterion and of the solvent, novel TlI complexes of different nuclearity featuring a 2,5-bis(2-pyridyl)phosphole ligand were synthesized.

Chemistry of bridging phosphanes: a comparative study within Cu(I)-Ag(I)-Au(I) triad-based homonuclear dimers.

Bridging ligands in Ag(I) and Au(I) bimetallic complexes: The P moiety of bis(2-pyridyl)phosphole acts as a symmetrically, semi-, or non-bridging donor in Ag(I) dimers (see figure). In related Au(I) complexes, only the non-bridging mode is observed. An unsaturated Ag(I) dimer is used as an adaptive molecular clip for the synthesis of pi-stacked metallocyclophanes.

Ag(I) bimetallic molecular clips with adaptive coordination behavior for supramolecular chemistry.

An Ag (I) dimer featuring a bridging phosphane ligand acts as an adaptive molecular clip for the coordination-driven synthesis of pi-stacked metallocyclophanes.