BACKGROUNDPsychosocial distress is common in patients with hematological malignancies in the acute phase of the disease. The aim of the study was to evaluate the treatment need and the realization of psychotherapeutic interventions of a routine psychosomatic liaison service delivery in hematological oncology.PATIENTS AND METHODS72 patients of the transplantation ward and of the general hematological oncological ward were consecutively included in the study. Assessments involved both self- and observer rating instruments.RESULTSThe need for psychotherapeutic treatment was 38 or 49%, depending on patients' or professional's view, respectively. 39% of the patients underwent psychotherapeutic treatment. But there was a great discrepancy between the treatment need estimated by observer and patients and the actual psychotherapeutic interventions.CONCLUSIONSThe utilization of psychotherapeutic interventions seems to be subject to a complex interaction between patient's need, 'objective' psychosocial distress and institutional conditions. The results highlight the importance of need for better identification of patients with psychosocial distress and better targeting of psychotherapeutic treatment.

The electron diffraction pattern of Sb(CH3)5 recorded with an all-glass inlet system at room temperature confirms the trigonal bipyramidal structure and yields the bond distances Sb-C(eq) = 214.0(5) pm and Sb-C(ax) = 226.4(11) pm. C-13 NMR spectra in CD2Cl2 contain only one line which remains sharp down to -90-degrees-C. The molecule presumably undergoes Berry pseudorotation over a square pyramidal transition state which leads to rapid exchange of axial and equatorial methyl groups. Trigonal bipyramidal and square pyramidal models of Sb(CH3)5 were optimized at the SCF MO level. Electron correlation was included with the modified coupled pair functional (MCPF) method. The calculations at this level suggest that the energy of the trigonal bipyramidal configuration is 7.1 kJ mol-1 below the energy of the square pyramidal configuration. Similar calculations on the unknown compound Bi(CH3)5 suggest that this molecule too would have an trigonal bipyramidal equilibrium configuration.

The syntheses and spectroscopic properties (IR and 1H and 13C NMR spectra) of tris(methylcyclopentadienyl)-scandium and -ytterbium are described. The vapour pressure of Yb(MeCP)3 has been determined over the range 70–90°C. The gas phase electron diffraction data for M(MeCP)3 (M  Sc or Yb) have been recorded with nozzle temperatures of about 160°C. The data for M  Yb are consistent with a model containing three pentahapto cyclopentadienyl rings; Yb(η5-MeCp)3, a mean Yb to ring-centre distance of YbZ = 236.6(6) pm, and a mean YbC bond distance of 265.5(7) pm. The gas phase electron diffraction data for M  Sc are incompatible with models containing three η5-MeCp rings, but consistent with models containing two η5 rings and one ring with a hapticity of 2 or 3; η2/3-MeCp. The distance from Sc to the centres of the two η5-MeCp rings is 222.3(6) pm, corresponding to a mean Sc C(η5) bond distance of 253.0(6) pm. The third ring is at a greater distance from the Sc atom, SCZ(η2/3) = 252(5) pm, but is tilted, the angle between the ScZ(μ2/3) vector and the ring normal being 22(4)°. As a result two or three carbon atoms of the ring are in a position to form strong bonds to the metal atom. Molecular mechanics calculations indicate that interligand interactions in M(η5-C5H4)3 or M(η5-MeCP)3 molecules are strongly repulsive when MZ(η5) is less than 225 pm, and that the strain is eliminated on rearrangement to M(η5-C5H5)2(η2/3-C5H5) or M(η5-MeCP)2(η 2/3-MeCp) configurations.

Gas electron diffraction data for monomeric GaCl3, monomeric InCl3 and PbCl4 have been recorded with nozzle temperatures of about 380, 480 and 20-degrees-C respectively. The data for GaCl3 and InCl3 are consistent with equilibrium structures of D3h symmetry and bond distances r(a) = 210.8(3) and 228.9(5) pm respectively. The data for PbCl4 are consistent with an equilibrium structure of T(d) symmetry and r(a) = 237.3(3) pm. Bond energies and distances from the literature show that the M-Cl bonds in MCl(g) are stronger, but longer, than in MCl3(g) for M = Al, Ga or In, and that M-Cl bonds in MCl2(g) are stronger, but longer, than in MCl4(g) for M = Ge, Sn or Pb. It is suggested that the relative weakness of the bonds in group-valent chlorides is due to the energy required to promote the Group 13 metal atoms from the 2P(s2p) ground states to 4P(sp2) valence states, or to promote the Group 14 metal atoms from 3P(s2p2) ground states to 5S(sp3) valence states. Further that the decreasing stability of the group-valent relative to subvalent chlorides as the Groups are descended is due both to increasing promotional energies and to decreasing M-Cl bond strengths.

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The structures of gaseous bis(trimethylsilyl)- and bis(trimethylgermyl)carbodiimide, Me3EN=C=NEMe3 (E = Si or Ge; Me = CH3) are determined by GED and extensively compared with related Si-N and Ge-N compounds. In case of the Ge-compound the structural principle based on IR- and RE spectra is confirmed, whereas the Si-compound turned out to be bent as well in contrast to the linear structure evaluated on basis of vibrational spectroscopy. The E-N bond lengths are 173.2(3) pm (E = Si) and 184.0(6) pm (E = Ge). The ENC valence angles are 142.0(11) and 131.4(9)-degrees, the ENNE dihedral angles are 44(2) and 59(4)-degrees, respectively. The C=N distances of 121.6(4) and 121.9(5) pm are identical within the esd's.

Gas electron diffraction data of (CH3)6Sn2 and (CH3)2Te2 are consistent with molecular models of D3 and C2 symmetry and bond distances Sn–Sn = 277.6(3) pm and Te–Te = 268.6(3) pm, respectively.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe coordination geometry of gaseous hexamethyltungsten is not octahedralArne Haaland, Andreas Hammel, Kristin Rypdal, and Hans V. VoldenCite this: J. Am. Chem. Soc. 1990, 112, 11, 4547–4549Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published inissue 1 May 1990https://pubs.acs.org/doi/10.1021/ja00167a065https://doi.org/10.1021/ja00167a065research-articleACS PublicationsRequest reuse permissionsArticle Views337Altmetric-Citations95LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts

[Li(C6H7)(C6H16N2)], M(r) = 202.27, orthorhombic, Pbca, a = 11.238 (2), b = 16.014 (3), c = 14.522 (3) angstrom, V = 2613.5 (8) angstrom 3, Z = 8, D(x) = 1.028 g cm-3, lambda(Mo K-alpha) = 0.71069 angstrom, mu = 0.549 cm-1, F(000) = 896, T congruent-to 173 K, R = 0.042 [1845 data, I > 2-sigma(I)]. The structure consists of discrete (eta-5-C5H4CH3) Li.tmen units (tmen = N,N,N,'N'-tetramethylethylenediamine). The Li atom is coordinated by the methylcyclopentadienyl ring and the two N atoms of the chelating tmen ligand. The average Li-C distance is 2.258 angstrom; the Li-N distances are 2.130 (3) and 2.124 (3) angstrom.

The reaction of methylcyclopentadiene with ytterbium in liquid ammonia yields bis(η5-methylcyclopentadienyl)ytterbiumamide, [Yb(mecp)2NH2]2 as a byproduct.

For the MOVPE growth of Er-doped InP layers we have synthesized tris(methylcyclopentadienyl)erbium, (Er(MeCp)3), and tris(isopropylcyclopentadienyl)erbium, (Er(IpCp)3) and used these compounds as solid and liquid precursors, respectively. The InP:Er layers were grown to study the incorporation behavior and the optical excitation and decay mechanisms of this rare earth element in a III–V compound semiconductor host crystal. Secondary ion mass spectrometry (SIMS) revealed Er concentrations up to 2×1019 cm-3 with a homogeneous Er distribution in the layer. Samples with these high doping concentrations have a semi-insulating character, probably a sign of a deep level correlated to the Er incorporation. A strong Er3+-related signal at 1.54 μm could be detected in low temperature photoluminescence experiments for the highly doped InP:Er samples. Codoping of the InP:Er samples with S or Zn has little influence on the shape and intensity of the Er emission.

For the Yb-doping of MOVPE grown InP, we have synthesized and used for the first time tris(isopropylcyclopentadienyl)-Yb, Yb(IpCp)3. This compound with its melting point at 47°C can be used as a liquid doping source, thus improving the reproducibility of the evaporation compared to the commonly used solid precursors. The grown InP:Yb layers revealed high photoluminescence intensities of the Yb 4f lines, although the Yb concentrations measured by SIMS were only in the range of 1017 cm-3. This indicates the high crystal quality of our samples. Additionally, we have grown InP:Yb:S layers and InP:Yb/InP:S multilayer structures with thicknesses between 10 and 100 nm for each layer to study the dependence of the excitation and decay processes on carrier and impurity concentration. The photoluminescence intensity of the 4f emission decreases for high S concentration in InP:Yb:S samples, whereas in the multilayer structures the intensity is the same as in InP:Yb samples. Based on the assumption of a homogeneous carrier concentration throughout the whole multilayer structure, we believe that a direct interaction between Yb and S atoms is responsible for the decrease in the double-doped single layers. The lifetime of the excited 4f state of Yb3+ is 13 μs, regardless of carrier or Yb concentration. For the InP:Yb samples co-doped with S, a fast nonexponential decay was observed, a further indication of some Yb-S pair interaction.

Tris(methylcyclopentadienyl)ytterbium(III), Yb(mecp)3, has been isolated from the reaction of YbCl3 with Na(MeCP) in THF. The compounds crystallizes in the monoclinic space group Cc with unit cell dimensions a 807.5(2), b 1393.5(3), c 2639.0(5) pm, β 94.55(2)°, and Dcalc. 1.841 g cm−1 for Z = 8. There are two molecules in the asymmetric unit cell forming double layers. The ring centroids describe a distorted trigonal geometry around the ytterbium atom.

The bis(η5-methylcyclopentadienyl)-1,2-dimethoxyethane compounds of calcium and ytterbium are obtained from the interaction of the metal with freshly distilled methylcyclopentadiene (Hmecp) in liquid ammonia, followed by crystallization from 1,2-dimethoxyethane (DME). In a similar reaction cyclooctatetraenylcalcium has been synthesized and characterized by metal analysis and vibrational spectroscopy. Ca(mecp)2 · DME crystallizes in the monoclinic space group C2/c with a 1121.4(2), b 1180.2(2) and c 1228.2(2) pm, β 102.11(1)° and ρcalc. 1.206 g/cm3 for Z = 4. The calcium ion is pseudo-tetrahedrally coordinated by the centres Z of the two methylcyclopentadienyl rings and the O atoms of the bidentate DME ligand. The crystal structure of Ca(mecp)2 · DME represents the first of the type Mcp2 · 2L or Mcp2-η2-L in the main group series and is extensively compared to related lanthanide compounds. On the basis of a new model the cyclopentadienyl compounds are divided into different groups. The model theory is used to predict the important structural parameters for the cyclopentadienyl compounds.

Highly doped InP:Yb layers have been grown by adduct metalorganic vapor phase epitaxy at atmospheric pressure. Yb(MeCp)3, where Me=CH3 and Cp=n5-C5H5, was synthesized as Yb source material because of its relatively high vapor pressure at acceptable source temperatures. The layers were grown in a wide range of growth temperatures (560–670 °C) and Yb mole fractions (10−9–10−7). In photoluminescence experiments they showed strong Yb3+-4f emission. The layers were further characterized by Hall measurements and secondary-ion mass spectroscopy. In order to obtain n-type InP:Yb samples with high carrier concentrations we have grown InP layers double doped with S and Yb.