The time differential perturbed angular correlation technique was applied to study the electric quadrupole interaction in various semiconductors. The quadrupole coupling of 111Cd in the InX and In2X3 compounds (X = S, Se, Te) are reported. In the orthorhombic InS we observed one quadrupole frequency which increases lineary withtemperature. The behaviour is the same in InTe. In InSe, however, the electric field gradient(EFG) scales with a T3/2power law, well known from former investigations in metals and semimetals.The strength of the interaction decreases from InS to InTe. The In2X3 semiconductors show several modifications. In2S3 exists in three phases and hasbeen investigated in the temperature range 25 K ≤ T ≤ 1200 K. In β-In2S3 (stable up to 693 K)two interaction frequencies have been observed. The high temperature modification γ-In2S3shows one EFG. In cubic α-In2S3 no EFG could be measured. In2Se3 exists in four modifications.The different phases and transition temperatures are not definite yet. In the β-phase (stablebetween 473 K and 823 K) we observed two energetically equal structures with different interactionfrequencies. Such a case has not yet been reported. In2Te3 has been investigated in theβ-phase only. The observed interaction is temperature independent. While in metals and semimetalsmost data can be well described by a T3/2 -dependence, semiconductors show differentresults.

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The synthesis of 1,4-benzodiazocines has been extended to include the 9-amines. The title compound, 6, was prepared from the known nor-base by N-acylation with cyclopropanecarboxylic acid anhydride, followed by nitration of the aromatic ring and sequential reduction of the resulting nitroamide. Standard in vivo bioassays for antinociceptive and opiate antagonist activities indicated that 6 is an analgesic agonist mixed narcotic antagonist whose oral to parenteral activity ratio approaches unity. Resolution of 6 established that the activity of the racemate resides in the dextrorotatory antipode. Several congeners were also prepared and tested. Their synthesis and structure-activity relationships are given in this paper.