A series of biphenyl-2,2'-diylbis(diarylmethanol)s 3, which have two kinds of aryl groups at the bay region, were efficiently obtained by integrated flow microreactor synthesis. The diols 3NO/NX are the precursors of unsymmetric biphenylic dications 2NO/NX2+, which are transformed into the corresponding dihydrophenanthrenes 1NO/NX via 2NO/NX+• upon reduction, when they exhibit two-stage color c...

We prove that RO^fNJ/fin, C*) is isomorphic under p = cf(2No) to the Boolean completion of the comparison ordering of the absolutely divergent series (downwards) and under Nj = cf(2No) to the Boolean completion of the ratio comparison ordering of absolutely convergent series (upwards).

We study the projective posets and their properties as forcing notions. We also define Martin’s axiom restricted to projective sets, MA(proj), and show that this axiom is weaker than full Martin’s axiom by proving the consistency of ZFC + XH + MA(proj) with “there exists a Suslin tree”, “there exists a non-strong gap”, “there exists an entangled set of reals” and “there exists K < 2No such that...

The mechanism and kinetics for the gas-phase hydrolysis of N(2)O(4) isomers have been investigated at the CCSD(T)/6-311++G(3df,2p)//B3LYP/6-311++G(3df,2p) level of theory in conjunction with statistical rate constant calculations. Calculated results show that the contribution from the commonly assumed redox reaction of sym-N(2)O(4) to the homogeneous gas-phase hydrolysis of NO(2) can be unequiv...

The two benzene rings in the cation of the title compound, C(15)H(18)N(4)O(2) (2+)·2NO(3) (-)·2H(2)O, are almost perpendicular [dihedral angle = 91.6 (2)°]. In the crystal, the components are linked by O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds.

In the title compound, C(6)H(10)N(2) (2+)·2NO(3) (-), the dication lies on a crystallographic twofold rotation axis. The nitrate ions are linked to the dications though N-H⋯O hydrogen bonds, forming a three-dimensional network.

1 Professor, Dept of Oral & Maxillofacial Surgery, Rajarajeswari Dental College & Hospital, RGUHS No. 14, Ramohalli Cross, Mysore Road, Kumbalgodu, Bangalore -560074 2NO 40, arunagiriyar street, tamil min nagar, thiruvannamalai. 606601 Tamil nadu 3Senior Lecturer, Dept of Oral & Maxillofacial Surgery, Rajarajeswari Dental College & Hospital, RGUHS No. 14, Ramohalli Cross, Mysore Road, Kumbalgod...

In the title compound, C(25)H(20)Br(2)N(2) (2+)·2NO(3) (-), the cation lies on a twofold rotation axis which imposes disorder of the dibromo-fluorene unit. In addition, the unique nitrate anion is disordered over two general sites of equal occupancy. The crystal structure is stabilized by inter-molecular N-H⋯O hydrogen bonds.

In the crystal structure of the title compound, C(5)H(9)N(3) (2+)·2NO(3) (-), the cations and anions are connected by inter-molecular N-H⋯O and C-H⋯O hydrogen bonds, forming a three-dimensional network. The crystal structure is further stabilized by π⋯π inter-actions between pyridinium rings [centroid-centroid distance = 3.775 (4) Å].