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A study of the donor-acceptor bond in phosphine-borane complexes
A nuclear magnetic resonance study of 15 phosphine-boranes has been undertaken with the view to investigating the electronic nature of the P-B dative bond. A correlation between the ³¹P-¹¹B coupling constant and the base ...
The logical structure underlying temporal references in natural language
Temporal references in natural language include tenses and other time relations, references to specific times, and a variety of phrases such as "present", "later", "when", "how often", and "never". Their high frequency of ...