Abstract
The structure of nitrosyltris(triphenylphosphine)rhodium, Rh(NO)-(P(C6H5)3)3, has been determined from three-dimensional X-ray data. The compound crystallizes in the space group P3 of the trigonal system with three molecules in a unit cell of dimensions a = 19.057(4) and c = 10.799(2)A. Least-squares refinement of the 162 variables has led to a value of the conventional R index (on F) of 0.052 for the 5456 independent reflections having F2o > 3 σ (F2o). There are three independent molecules in the unit cell, one-third of each being unique. The best first approximation is to describe the complex as a tetrahedral Rh( -I) complex; average parameters: Rh—P = 2.350(3), Rh—N = 1.759(13), N—O = 1.27(2) A, P—Rh—P = 102.2(6), N—Rh—P = 116.0(5), Rh—N—O = 156.7(26)°. The nitrosyl groups are disordered about the threefold axes. The structure is compared with other metal nitrosyl phosphine complexes and the metal-nitrosyl bonding is discussed.
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