Reactivity of Yellow Arsenic towards Cyclic (Alkyl)(Amino) Carbenes (CAACs).

Different cyclic (alkyl)(amino)carbenes (CAACs) were reacted with yellow arsenic. Several products [(CAAC-n) (μ,η -As )] (n=1 (1), 4 (2)), [(CAAC-2) (μ ,η -As )] (3) and [(CAAC-3) (μ ,η - As )] (6) were isolated due to the differing steric properties of CAAC-1-4. The products contain As , As or As units and represent the first examples of CAACs-substituted products of yellow arsenic.

Reactivity of E (E =P , As , AsP ) towards Low-Valent Al(I) and Ga(I) Compounds.

The reactivity of yellow arsenic and the interpnictogen compound AsP towards low-valent group 13 compounds was investigated. The reactions of [LAl] (1, L=[{N(C H Pr -2,6)C(Me)} CH] ) with As and AsP lead to [(LAl) (μ,η -E )] (E =As (3 b), AsP (3 c)) by insertion of two fragments [LAl] into two of the six E-E edges of the E tetrahedra. Furthermore, the reaction of [LGa] (2) with E afforded [LGa(η -E )] (E =As (4 b), AsP (4 c)).

Binding, Release and Functionalization of Intact Pnictogen Tetrahedra Coordinated to Dicopper Complexes.

The bridging MeCN ligand in the dicopper(I) complexes [(DPFN)Cu (μ,η  : η -MeCN)][X] (X=weakly coordinating anion, NTf (1 a), FAl[OC F (C F )] (1 b), Al[OC(CF ) ] (1 c)) was replaced by white phosphorus (P ) or yellow arsenic (As ) to yield [(DPFN)Cu (μ,η  : η -E )][X] (E=P (2 a-c), As (3 a-c)). The molecular structures in the solid state reveal novel coordination modes for E tetrahedra bonded to coinage metal ions. Experimental data and quantum chemical computations provide information concerning perturbations to the bonding in coordinated E tetrahedra.

Triple-decker complexes incorporating three distinct deck architectures.

The reactivity of the dilithioplumbole ([Li(thf)(μ,η-L)], L = 1,4-bis--butyl-dimethylsilyl-2,3-bis-phenyl-plumbolyl) towards the reactive pnictogen precursors P, pentaphosphaferrocene, and pentaarsaferrocene ([Cp*Fe(η-E)] (Cp* = η-CMe, E = P, As)) is reported. The reaction with P afforded a phospholyl lithium complex, lead-phosphorus exchange, while the reactions with [Cp*Fe(η-E)] yielded the first examples of Pb-Fe-Li heterotrimetallic triple-decker polypnictogenides with three different deck motifs.

Conversion of E (E =P , As , AsP ) by Ni(0) and Ni(I) Synthons - A Comparative Study.

The reactivity of white phosphorus and yellow arsenic towards two different nickel nacnac complexes is investigated. The nickel complexes [(L Ni) tol] (1, L =[{N(C H Pr -2,6)C(Me)} CH] ) and [K ][(L Ni) (μ,η -N )] (6) were reacted with P , As and the interpnictogen compound AsP , respectively, yielding the homobimetallic complexes [(L Ni) (μ-η ,κ :η ,κ -E )] (E=P (2 a), As (2 b), AsP (2 c)), [(L Ni) (μ,η -E )] (E=P (3 a), As (3 b)) and [K@18-c-6(thf) ][L Ni(η -E )] (E=P (7 a), As (7 b)), respectively. Heating of 2 a, 2 b or 2 c also leads to the formation of 3 a or 3 b.

Reactivity of Cu(I) Nacnac Complexes Toward Polypnictogen Compounds.

The nacnac Cu(I) compound [LCu(MeCN)] () (L = [{N(CHMe-2,6)C(Me)}CH]) was reacted with complexes containing aromatic -E ([Cp*Fe(η-E)], E = P (), As (), Cp* = η-CMe), -P ([Cp‴Co(η-P)] (), Cp‴ = η-CHBu) and -E ligands ([Cp‴Ni(η-E)], E = P (), As ()) yielding the heterometallic complexes [(Cp*Fe)(μ,η-E)(LCu)] (E = P (), As ()), [(Cp*Fe)(μ,η-E)(LCu)] (E = P (), As ()), [(Cp‴Co)(μ,η-P)(LCu)] (), [(Cp‴Co)(μ,η-P)(LCu)] (), and [(Cp‴Ni)(μ,η-E)(LCu)] (E = P (), As ()). These complexes are rare examples of the coordination of a group 11 metal to aromatic -E (E = P, As; = 3-5) ligands. All products were comprehensively characterized by crystallographic and spectroscopic methods.

Measurement of immature platelets with Abbott CD-Sapphire and Sysmex XE-5000 in haematology and oncology patients.

Background: Measurement of immature platelets was introduced into routine diagnostics by Sysmex as immature platelet fraction (IPF) some years ago and recently by Abbott as reticulated platelet fraction (rPT). Here, we compare both methods.

Methods: We evaluated the precision and agreement of these parameters between Sysmex XE-5000 and Abbott CD-Sapphire in three distinct thrombocytopaenic cohorts: 30 patients with beginning thrombocytopaenia and 64 patients with recovering platelets (PLT) after chemotherapy, 16 patients with immune thrombocytopaenia (ITP) or heparin-induced thrombocytopaenia type 2 (HIT) and 110 additional normal controls.