J 2015

C=O center dot center dot center dot pi Interaction: A Rare Noncovalent Binding in RC(O)NHP(O)[(NRR2)-R-1](2) Phosphoric Triamide Structures

CHAIJAN, Mahnaz Rostami, Mehrdad POURAYOUBI, Marek NEČAS a Krishnan DAMODARAN

Základní údaje

Originální název

C=O center dot center dot center dot pi Interaction: A Rare Noncovalent Binding in RC(O)NHP(O)[(NRR2)-R-1](2) Phosphoric Triamide Structures

Autoři

CHAIJAN, Mahnaz Rostami (364 Írán), Mehrdad POURAYOUBI (364 Írán), Marek NEČAS (203 Česká republika, garant, domácí) a Krishnan DAMODARAN (356 Indie)

Vydání

Phosphorus, Sulfur, and Silicon and the related elements, Taylor and Francis Inc. 2015, 1042-6507

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10402 Inorganic and nuclear chemistry

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 0.723

Kód RIV

RIV/00216224:14310/15:00086934

Organizační jednotka

Přírodovědecká fakulta

DOI

UT WoS

000357323000056

Klíčová slova anglicky

CSD; C=O center dot center dot center dot pi; phosphoric triamide; crystal structure

Štítky

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 13. 3. 2018 10:19, doc. Mgr. Marek Nečas, Ph.D.

Anotace

V originále

In the structure of C6F5C(O)NHP(O)[N(C2H5)(C6H11)](2), in addition to N-H center dot center dot center dot O=P hydrogen bond, the oxygen atom of P=O group is involved in the P=O center dot center dot center dot pi interaction (O-P center dot center dot center dot Cg = 3.507(1) angstrom, Cg is the centroid of C6F5 ring). Moreover, a noncovalent C=O center dot center dot center dot pi interaction takes part in the crystal packing, O-C center dot center dot center dot Cg = 3.159(1) angstrom. The C=O center dot center dot center dot pi interaction is the interesting feature of this structure, as a Cambridge Structural Database analysis (CSD; Allen, Acta Cryst. 2002, B58, 380-388) of 149 structures with a C(O)NHP(O)[N](2) skeleton shows that such an interaction exists only in 4 structures. The dihedral angle between the aromatic ring and the plane defined by the atoms of [C][N]C=O segment is 66.66 degrees. The C=O bond length in the present structure (of 1.2148(18) angstrom) is within the expected range for compounds with a C(O)NHP(O)[N](2) segment; however, due to the electronic effect caused by C6F5 group, it is in the region of the short bond lengths for analogous structures deposited in the CSD (1.18-1.26 angstrom). The P=O (1.4831(10) angstrom) and P-N (1.6340(12) angstrom and 1.6424(12) angstrom) bond lengths are standard for a phosphoric triamide structure and the P-N bond of C(O)NHP(O) segment (1.6980(12) angstrom) has an expected longer value relative to the other P-N bonds. The bond-angle sums around the tertiary nitrogen atoms (SUM = 2 x P-N-C + C-N-C) are 357.8 degrees and 352.0 degrees that show few deviations from the planar value of 360 degrees. The more pyramidal N atom is oriented so that the corresponding lone electron pair is anti with respect to the P=O group.