bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fuel fabrication and reprocessing for nuclear fuel cycle with inherent safety demands
Authors: Shadrin Andrey Yurevich , Dvoeglazov Konstantin Nikolaevich , Ivanov Valentine Borisovich , Volk Vladimir Ivanovich , Skupov Mikhail Vladimirovich , Glushenkov Alexey Evgenevich , Troyanov Vladimir Mihaylovich , Zherebtsov Alexander Anatolievich 
Published: February 2015

Abstract
The strategies adopted in Russia for a closed nuclear fuel cycle with fast reactors (FR), selection of fuel type and recycling
technologies of spent nuclear fuel (SNF) are discussed. It is shown that one of the possible technological solutions for the closing of
a fuel cycle could be the combination of pyroelectrochemical and hydrometallurgical methods of recycling of SNF. This combined scheme
allows: recycling of SNF from FR with high burn-up and short cooling time; decreasing the volume of stored SNF and the amount of
plutonium in a closed fuel cycle in FR; recycling of any type of SNF from FR; obtaining the high pure end uranium-plutonium-neptunium
end-product for fuel refabrication using pellet technology.
Diffusion in Non-ideal Liquid Mixtures
Authors: Haase R. , Engels W. 
Published: February 2015

Abstract
An equation proposed recently (Haase and Jansen, 1980) relates to the dependence on composition and temperature of the diffusion coefficient D and of the kinematic diffusion coefficient D* in a binary nonelectrolyte solution. This equation is now applied to our own measurements of the activity coefficients and of the diffusion coefficient in the non-ideal liquid system carbon tetrachloride + acetone at 20 °C and 40 °C over the entire range of compositions. (For 0 °C only values of D are available.) It turns out that the function D (x), where x denotes the mole fraction of one of the components, exhibits a minimum at each temperature, while D* (x) nearly represents a straight line. We establish a correlation between the deviations from Raoult's Law and the sign of the difference D - D*.
The Duschinsky Effect and Optical Spectra
Authors: Olbrich G. , Kupka H. 
Published: February 2015

Abstract
The influence of the normal mode rotation (i.e. the Duschinsky mixing) on the molecular electronic spectra in polyatomic molecules is treated by means of multidimensional intramolecular distributions (MID). It is shown that symmetry properties of the two-dimensional MID which relate emission and absorption spectra or pertain to the exchange of modes do not exist if the number of non-separable modes exceeds 2. Specific examples of emission band shapes are calculated for weakly (linear) coupled electronic states for both, zero and finite temperatures. The strength of the mixed quadratic interaction parameter is shown to influence the shape considerably.
An Experimental and Theoretical Dipole Moment Study of 2-Chloropyridine-5-sulphonyl Chloride
Authors: Lumbroso H. , Montoneri E. , Pappalardo G. C. 
Published: February 2015

Abstract
Analysis of the dipole moment of 2-chloropyridine-5-sulphonyl chloride in benzene at 30 °C (2.00 D) supports a model in which the C(5)-SCl group is rotated by 40° from the 2-chloro-1-pyridyl group (see Figure 1). Such a model, with the S-Cl chlorine atom close to the 1-azani-trogen atom, may be explained by interplay of two con-flicting factors, namely sulphonylchloride-arene conjuga-tion and lesser repulsion between one of the oxygen atoms and the aza-nitrogen atom.
Elektronenspektren der Fluoro-Chloro-Iridate(IV),[IrFnCl6-n]2-,n=1-5
Authors: Preetz W. , Tensfeldt D. 
Published: February 2015

Abstract
The electronic absorption spectra of the solid tetramethylammonium salts of [IrFnC6-n]2-, n=1-5, including the stereoisomers for n = 2, 3, 4, were measured in KCl pellets at 10 K, the electronic Raman spectra (ER) on rotating samples of the pure complex salts at 80 K. The strong bands in the UV/VIS region are assigned as charge-transfer transitions from σ(t1u), π(t1g, t1u, t2u) Cl orbitals into the π (t5
2g) Ir(IV) level. The observed splittings and shifts are interpreted by qualitative MO treatment "according to the point groups D4h, C4v, C3v and C2v of the mixed ligand complexes. Two week bands in the NIR region between 1650 and 2000 nm are assigned to intraconfigurational transitions within the 2T2g(Oh) ground term, split by spinorbit coupling (5000-6000 cm-1) and lowered symmetry (30-110 cm-1) into three Kramers doubletts. The assignment of the O-O transitions is confirmed by stronger bands at the same frequencies in the ER spectra. They are coupling preferably with odd vibration modes in the absorption and with even modes in the ER spectra. The hypsochromic shift of the d-d-bands corresponds with the increase of the relativistic nephelauxetic ratio β* from 0.75 to 0.90 and indicates the loss of covalency with increasing number of F ligands.
X-Ray Emission and Absorption Spectroscopy with Binary Amorphous Alloys from the B-Co-, B-Ni-, Co-P-, Co-Ti-, Cu-Mg-, Cu-Ti-, Mg-Zn-, Ni-P-, and Ni-Ti-Systems
Authors: Falch S. , Lamparter P. , Steeb S. 
Published: February 2015

X-ray emission and absorption spectroscopy has been used to determine the partial density of occupied and unoccupied states in various metallic glasses. The X-ray emission spectra also indicate a possible electronic charge transfer between the alloyed atoms. The experiments were done by means of an electron microprobe. Amorphous Mg2Cu was prepared by ionic sputtering, the glasses of the Mg-Cu-, Mg-Zn-, Cu-Ti-, Co-Ti-, Co-B-, Co-P-, Ni-Ti-, Ni-B-, and Ni-Psystems by the melt-spinning method.
From the measurements it is concluded that the amorphous phase is stabilized by compound formation. A combination with results of X-ray diffraction measurements on amorphous Mg2Cu indicates that the glassy structures should be favoured by a correlation between the atoms of higher electronegativity. The shape of the density of unoccupied states vs. energy curve shows that the local symmetry around the Zn- and Cu-atoms in the amorphous phases differs from that in the corresponding crystalline phases. For the transition-metalloid glasses evidence for a fcc-like local short range order is found.
Source Properties of a Hollow Cathode Arc Plasma
Authors: Vogels J. M. M. J. , Konings L. U. E. , Schram D. C. 
Published: February 2015

Experiments have been carried out on the properties of a hollow cathode as an ion-source.
The measured electron density, ion and neutral temperatures and drift velocities have been compared with predictions from the conservation laws for matter, momentum and energy.
Very large exit drift velocities of ions and neutrals are observed. The magnitude and direction, against the electric field, can be explained on the basis of the momentum balance. At weak magnetic field strengths even supersonic drift velocities are found. The charge flux carried by the ions is about five percent of the net arc current. For small flows, the ionized fraction of the gas supply approaches 100%.
The neutral particle density outside the cathode consist of a fraction drifting with a large velocity out of the cathode and a fraction of cool background atoms. The change of the ratio of these fractions with increasing distance to the cathode causes the average neutral particle drift to decrease very rapidly.
Finally, an analysis of the overall cathode power balance is given.
A Multichannel “Potential Curves Hopping” Model for Inelastic Collisions
Authors: Campos D. , Tejeiro J. M. , Cristancho F. 
Published: February 2015

We introduce a multichannel “potential curves hopping” model and obtain the exact quantum mechanical S-matrix by solving the associated set of coupled second-order ordinary differential equations that describes the inelastic collisions between atomic particles. The only assumption is that the interaction matrix element between each pair of channels (say, γ and β) is of the form Uγβ(r) = Uβγ(r) =: Uγβ δ( r - rγβ), where δ (c) is the Dirac deltafunction, and rγβ and Uγβ are parameters which can be chosen freely.
Semiclassical techniques can be incorporated directly in the theory if the Schrödinger equations for the uncoupled channels allow this treatment. The formulation is particularized to the two-channel problem and illustrated with a semiclassical example the He+ + Ne problem at 70.9 eV.
A Modelling and XANES Study on the Structure of the Amorphous Fe90Zr10-Alloy
Authors: Kizler P. , Lamparter P. , Steeb S. 
Published: February 2015

Abstract
It is shown that it is possible to set up a structural model for the amorphous Fe90Zr10-aIloy which is in agreement both with diffraction and XANES data, the latter being sensitive to higher than binary correlations.
Nitrogen Hyperfine Structure in the Rotational Spectra of 4-Pyridinecarbaledhyde and 3-Pyridinecarbaldehyde
Authors: Stryjewski Detlef , Heineking Nils , Dreizler Helmut 
Published: February 2015

Abstract
We have resolved and analysed the nuclear quadrupole hyperfine structure in the rotational spectra of 4-pyridinecarbaldehyde and 3-pyridinecarbaldehyde, C5H4NCHO. The results are discussed and compared to those of previously measured pyridine compounds. The electron withdrawing effect of the aldehyde-function, in the 3- and 4-position at the ring system, has been calculated, and the differences in the results are discussed.
Energie- und Varianzminimierung unter Verwendung korrelierter Wellenfunktionen
Authors: Kleindienst H. , Wolpers M. , Filberg D. 
Published: February 2015

Abstract
The influence of an additive correlation term in the wave-function on the energy and the variance is discussed for the example of He-atom. Furthermore, a correlated orbital like Ansatz is tested for this case.
Local Structure and Okada's Empirical Relation for the Internal Mobility of Cations in Molten Alkali Nitrates
Authors: Habasaki Junko 
Published: February 2015

The empirical relation
bi = (V - FOi)-1 Ai exp(- Ei/RT)
for the internal mobility bi of cations i in mixtures of molten alkali nitrates, where V is the molar volume of the mixture, is compared with MD simulations. For pure LiNO3 and NaNO3 it is found that (V-Voi)-1 is proportional to the concentration of oxygens in the first coordination shells of the cations i.
Tripod-Liganden mit zwei verschiedenen Donorgruppen: Synthese und Koordinationsverhalten von H3CCH(CH2PPh2)2(CH2OH) / Tripod Ligands with Two Different Donor Groups: Synthesis and Coordination of H3CC(CH2PPh2)2(CH2OH)
Authors: Muth Andreas , Reinhard Gunther , Huttner Gottfried , Seitz Thomas , Klein Thomas , Zsolnai Laszlo 
Published: February 2015

Abstract
Starting from pentaglycerin, H3CC(CH2OH)3, a convenient three step synthesis of the tri­pod ligand H3CC(CH2PPh2)2(CH2OH) (3) (abbreviated as PPO(H)) is described and its struc­ture is established by the usual analytical methods as well as by X-ray analysis. The ligand behaves as a bidentate donor towards nickel(II) as shown by the formation and X-ray analysis of the complex {PPO(H)}NiBr2 (4). In the square planar complex 4 only the PPh2 groups are coordinated. In the tetrahedral complex [{PPO(H)}2Ni](BF4)2 (5) two PPO(H) ligands sur­round nickel as bidentate ligands.
Synthesis and Molecular Structure of Silylated Ethenes and Acetylenes
Authors: Rüdinger Christoph , Beruda Holger , Schmidbaur Hubert 
Published: February 2015

Abstract
Disilylacetylene (1) has been obtained from LiAlH4 reduction of bis(trichlorosilyl)acetylene (2) and bis[(trifluoromethylsulfonyloxy)silyl]acetylene (4). The catalytic hydrosilylation of 2 with HSiCl3 affords tris(trichlorosilyl)ethene (5) and 1.1.2-tris(trichlorosilyl)ethane (6). The synthesis of 6, trans-bis(trichlorosilyl)ethene (8) and 1,1-bis(trichlorosilyl)ethene (9) has been accomplished by hydrosilyiation of trichlorosilylacetylene (7) which was synthesized by the reaction of trichloro(trifluoromethylsulfonyloxy)silane with sodium acetylide. Reductive elimination of halogen from 1,1,1,2-tetrachloro-bis(trichlorosilyl)ethane (10) and 1,2- dibromo-1,1-bis(trichlorosiIyl)ethane (13) gave the corresponding ethenes 1,1-dichloro-bis- (trichlorosilyl)ethene (11), trichloro-trichlorosilylethene (12), 1,1-bis(trichlorosilyl)ethene (9) and 1-chloro-2,2-bis(trichlorosilyl)ethene (14). Tetrakis(trichlorosilyl)ethene (15) has been obtained in a three step synthesis starting from chloromethyl-trichlorosilane or dichloro- methyl-trichlorosilane. By LiAlH4 reduction of trichlorosilylethenes under various reaction conditions, the silylethenes trans-dichloro-di(silyl)ethene (16), 1,1-dichloro-di(silyl)ethene (17), trichloro-silylethene (18), 1-bromo-l-silylethene (19), trans-di(silyl)ethene (20), 1-chloro-2,2-di(silyl)ethene (21), tri(silyl)ethene (22) and 1,1,2-tri(silyl)ethane (23) could be generated. Silylethyne and silyl-chloroethyne were identified as side products. The crystal and molecular structures of 2,5 and 15 have been determined by single crystal X-ray diffraction. 2 and 5 crystallize from the melt in the monoclinic space groups Cc and P21/n, respectively. 15 has been crystallized by sublimation (orthorhombic. space group Pbca). 5 and 15 feature strongly distorted ethene skeletons with a double bond twist of 28.1° in 15.
Kristallisation und Strukturuntersuchung von Alkali-Parawolframaten / Crystallization and Structure Determination of Alkaline Metal-Paratungstates
Authors: Chrissafidou A. , Fuchs J. , Hartl H. , Palm R. 
Published: February 2015

The syntheses and crystal structures of the following paratungstates-Z with different alkaline cations are reported and discussed:
Na10[H2W12O42] · 20H2O (I), Na10[H2W12O42] · 27H2O (II), Na10[H2W12O47] · 28H2O (III), K10[H2W12O42] · 10H2O (IV), K6Na4[H2W12O42] · 13H2O (V), Cs6Na4[H2W12O42] · 16H2O (VI), Cs8Na2[H2W12O42] · 10H2O (VII), Cs8Na2[H2W12O42] · 12H2O (VIII), K3Na7[H2W12O42] · 24H2O (IX) and K5Na2[H2W12O42] · 12H2O (X). Priority has been set on the description of the coordination of the cations with the oxygen ligands H2W12O42
10- and H2O.
Zur Kenntnis des Oxocuprats (Cu,Co)3,75Mo3O12 / On the Oxocuprate (C u,Co)3,75Mo3O12
Authors: Szillat H. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of (Cu,Co)3,75Mo3O12 have been prepared by recrystallization from melts and investigated by X-ray diffractometer techniques. The compound crystallizes with orthorhombic symmetry, space group D16
2h-Pnma, a = 5.092(1), b = 10.624(3), c = 17.804(4) Å, Z = 4 and is isotypic to NaCo2.31Mo3O12. The crystal structure is discussed and it is shown, that the trigonal prismatically coordinated copper positions are occupied in a different manner. One of the alternate sites is beside the centre of the prisms, and the other one is shifted towards one of the faces of the rectangular prism. This detail may be interpreted by assigning the valance states CuI and CuII. The MO6 octahedra are occupied statistically by copper and cobalt.
Zur Darstellung und Kristallstruktur eines neuen Kupfer-Antimon-Oxomolybdats: CuSbMo2O8 / On the Synthesis and Crystal Structure of a New Copper Antimony Oxomolybdate: CuSbMo2O8
Authors: Szillat H. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of the hitherto unknown compound CuSbMo2O8 were prepared by recrystallization from melts in closed copper tubes and investigated by X-ray diffractometer technique. CuSbMo2O8 crystallizes in a new structure type with monoclinic symmetry, space group C6
2h - I12/a1, a = 5.554(2), b = 4.916(1), c = 21.519(4) Å, β = 93.42(3)°, Z = 4. The crystal structure shows SbIII in a one-sided coordination by four oxygen. Molybdenum shows the rare octahedral coordination by oxygen. MoO6 and CuO6 octahedra form triple layers stacked and connected by Sb ions along [001].
Ga1.93V0.97S4, eine neue gemischtvalente Verbindung mit α-FeGa2S4-Struktur / Ga1.93V0.97S4, a New Mixed Valent Compound with α-FeGa2S4 Structure
Authors: Cordes W. , Reil S. , Haeuseler H. 
Published: February 2015

Abstract
The mixed valence compound Ga1.93V0.97S4 has been prepared and characterized by X-ray powder methods. The compound crystallizes in an α-FeGa2S4 structure. The lattice parameters of the hexagonal cell are a = 363.6 and c = 1207.1 pm. The structure has been refined by Rietveld methods.
Synthesis of a New Optically Active Triphosphine with a Neopentane Backbone
Authors: Heidel Horst , Huttner Gottfried , Zsolnai Laszlo 
Published: February 2015

Abstract
The resolution of the racemate (BzlOCH2)(Me)C (COOH)(COOEt) (±)1 is the entry point for the enantioselective synthesis of the key compound 7 (MeC(CH2Cl)(CH2Br)(CH2OTfl)). Successive phosphination of 7 furnishes the triphosphine 10 (MeC(CH2PPh2)(CH2DBP)(CH2P(3,5-Me2C6H3)2) in both enantiomeric forms (DBP = dibenzophospholyl). The structures of the precursors (+)8S(MeC(CH2PPh2)(CH2DBP)(CH2Cl)) and (±)9 (MeC(CH2Br)(CH2Cl)(CH2DBP)) have been confirmed by X-ray analysis.
CuTb2[B8O16]: Das erste „Metaborat“ mit einem 1
∞[B8O16]8--Anion / CuTb2[B8O16]: The First “Metaborate” with a 1
∞[B8O16]8- Anion
Authors: Schaefer Jan , Bluhm Karsten 
Published: February 2015

Abstract
Pale bluish-green single crystals of the new compound CuTb2[B8O16] have been obtained by a B2O3 flux technique. They crystallize in an unknown structure type. X-ray investigations on single crystals led to the space group C5
2h-P21/c (Nr. 14) with lattice parameters a = 1024.6(1); b = 834.93(6); c = 622.87(6) pm , β = 90.45(2)°; Z = 2. The structure contains 1
∞[B8O16]8- chains isolated from each other, which include tri- and tetracoordinated boron. The chains consist of alternating twelve- and eight-membered rings of boron and oxygen connected by BO4 units. Tb3+ is octacoordinated and Cu2+ is hexacoordinated in elongated octahedra by oxygen. The relation to the crystal structures of Tb[B3O6] and CuTb[B5O10] is pointed out.
Der erste stabile Metallkomplex mit Hydrid- und Carbonyl-Brücke ohne weitere Brücken- und π - Akzeptorliganden [(TMEDA)Ni(μ-H,μ-CO)Ni(TMEDA]X (TMEDA: N,N,N′,N′ -Tetramethylethylendiamin, X = Monoanion der cis-Cyclohex-4-en oder Cyclohexandicarbonsäure) / The First Stable Metal Complex with Hydrid- and Carbonyl Bridges without Supporting Bridging and π-Acceptor Ligands [(TMEDA)Ni(μ-H,μ-CO)Ni(TMEDA)]X (TMEDA: N,N,N′,N′-Tetramethylethylenediamine, X = Mono-anions of cis-Cyclohex-4-ene or Cyclohexanedicarboxylic Acid)
Authors: Storch Christine , Fischer Reinald , Walther Dirk , Kempe Rhett 
Published: February 2015

Abstract
The complex [(TMEDA)Ni(μ-H,μ-CO)Ni (TMEDA)]X 1a (TMEDA: N,N,N',N'-Tetramethylethylenediamine, X: Monoanions of cis-cyclohex-4-ene- or cyclohexane-dicarboxylic acid) could be isolated as the product of a stepwise reaction in THF solution of Ni(COD)2, TMEDA and cis-cyclohex-4-ene-dicarboxylic-anhydride in the presence of a small amount of water. Similar results are obtained with cyclohexane-dicarboxylic-anhydride. NMR- and IR-spectroscopic measurements and the single crystal X-Ray diffraction analysis of 1a have established the structure: Both a hydride- and a carbonyl bridge are linking two (TMEDA)Ni fragments in the cationic part. The Ni(I) centers are connected by a Ni-Ni-bond . The compounds are the first (TMEDA)Ni(I) complexes and the first binuclear hydrido-carbonylcomplexes which are stable without further bridging and π-acceptor ligands. They contain hydrido and protic hydrogen in the same compound.
Kristallstrukturen der „supramolekularen“ 1,4-Diazabicyclo[2.2.2]octan- Quecksilber(II)-Komplexe [Hg(dabco)I2] und [Hg(dabco)(SCN)2] / Crystal Structures of the “Supram olecular” 1,4-Diazabicyclo[2.2.2]octane Mercury(II) Complexes [Hg(dabco)I2] and [Hg(dabco)(SCN)2]
Authors: Pickardt Joachim , Shen Jing , Gong Gill-Taik 
Published: February 2015

Abstract
Reactions of 1,4-diazabicyclo[2.2.2]octane (“dabco”) with K2[HgI4] or Hg(SCN)2 yield crystals of [Hg(dabco)I2] (1) and [Hg(dabco)(SCN)2] (2). 1 crystallizes monoclinically, space group P21/a. Z = 4, a = 1211.6(5), b = 682.3(6), c = 1430.4(3) pm, β = 98.90(5)°; 2 is orthorhombic, space group Pmmn, Z = 2, a - 740.5(3), b = 609.1(4), c = 1220.0(8) pm. In 1 HgI2 groups are connected by bridging dabco molecules to give a chain structure. The Hg atoms are tetrahedrally coordinated. In 2 the Hg atoms are bridged by two SCN ligands and the chains thus formed are again interconnected by bridging dabco molecules, whereby layers are formed. The coordination polyhedron for the Hg atoms is a distorted octahedron.
Liquid Crystalline Compounds in the Thiophene Series, Part 11+ Liquid Crystalline Thiophene Carboxylic Esters
Authors: Koßmehl Gerhard , Hirsch Barbara 
Published: February 2015

The new series of ten 4,4'-bis(5-alkyl-2-thienylcarbonyloxy)azobenzenes (2a -2j) and ten 2,5-bis(5-alkyl-2-thienylcarbonyloxy)toluenes (3a -3j) were prepared. These, as yet unknown esters were characterized in relation to their structures by elemental analyses, IR, UV, 1H NMR spectra and MS.
The azobenzene-esters 2a -2j which form liquid crystalline phases were studied by microscopy under polarized light and DSC (differential scanning calorimetry). Through the observation of the optical textures nematic phases were monitored. Only 2j has an additional smectic phase; 2h and 2i form monotropic smectic phases during cooling. The toluene-esters 3a -3j do not form liquid crystalline phases.
Über die Reaktion von CF3OCI mit Lewis-Säuren und Br2 und I2 / Reaction of CF3OCI with Lewis Acids and with Br2 and I2
Authors: Minkwitz Rolf , Konikowski Detlef 
Published: February 2015

The reactions of CF3OCl with SbX5 (X = F, Cl) and AsF5 at 195 K yield the adducts CF3OCl · SbX5 and CF3OCl · AsF5 respectively. At 213 K CF3OCI · SbCl5 forms SbCl4F, Cl2 and OCF2, while compounds CF3OCl · MF5 (M = As, Sb) slowly decompose giving ClF, OCF2 and mixed M(V) halides.
The formation of IF5, OCF2 and Cl2 in the oxidative fluorination of I2 with CF3OCl at 293 K is described. Br2 reacts with CF3OCl to give BrF3 under similar conditions.
New Dimeric Tetrapeptide Enkephalin Analogues with Fiveor Six-Carbon Hydrophilic Spacers
Authors: Zajączkowski I. , Stępiński J. , Temeriusz A. , Tam S. W. 
Published: February 2015

Abstract
To investigate the role of distance between two opioid peptide pharmacophores on binding activities to delta, mu and kappa receptor in vitro, a number of new dimeric enkephalin analogues were synthesized in which two identical tetrapeptides: Tyr-D-Ala-Gly-Phe were connected together at their C-termini by α,ω-diamino-α,ω-dideoxyalditols. The length of the hydrophilic spacer (3 -6 carbons) did not affect the affinities for delta receptors, whereas the affinities for mu and kappa receptors were dependent on the length as well as the configuration of the spacer. The analogues had high affinities, and some of them possessed moderate delta selectivity.
Aminolyse von Cp2ZrCl{P(SiMe3)2} - Synthese und Molekülstruktur von Cp2ZrCl(NHPh) / Aminolysis of Cp2ZrCl{P(SiMe3)2} - Synthesis and Molecular Structure of Cp2ZrCl(NHPh)
Authors: Lindenberg Frank , Hey-Hawkins Evamarie , Baum Gerhard 
Published: February 2015

Abstract
The reaction of Cp2ZrCl{P(SiMe3)2} with aniline yields the terminal zirconocene phenylamido complex Cp2ZrCl(NHPh) (1) and HP(SiMe3)2. 1 was characterized spectroscopically (n.m.r., i.r.) and by X-ray structure determination (monoclinic space group P2 {ln, a - 6.589(2), b = 19.978(3), c = 13.512(2) Å , β = 101.09(2)° (at 200 K)). The NHPh group is planar with Zr -N 2116(10) Å.