C1-compounds

(noun)

chemical compounds containing only one carbon atom, for example, methanol.

Related Terms

Examples of C1-compounds in the following topics:

  • Organic Acid Metabolism

    • Some microbes are capable of utilizing such compounds as a sole source of energy.
    • It is vital in the catabolism of C1 compounds such as methanol (see the "Methylotrophy and Methanotrophy" atom for more information on C1 compound utilization).
    • Methylotrophic microbes convert single-carbon compounds to formaldehyde, which is oxidized to formate by formaldehyde dehydrogenase.

  • Methylotrophy and Methanotrophy

    • Methylotrophs and methanotrophs are a diverse group of microorganisms that can derive energy from the metabolism of single-carbon compounds.
    • Multiple diverse microorganisms have evolved the intriguing ability to utilize single-carbon (C1) compounds (e.g. methanol or methane) or multi-carbon compounds lacking carbon bonds (e.g. dimethyl ether and dimethylamine) as the sole energy source for their growth.
    • Methylotrophs, in general, aerobically utilize C1 compounds by oxidizing them to yield formaldehyde.
    • The fact that some methylotrophs can also make use of multi-carbon compounds distinguishes them from methanotrophs, which are usually fastidious methane and methanol oxidizers.
    • This is the general utilization pathway for C1 compounds.

  • Alphaproteobacteria

    • The Alphaproteobacteria comprise most phototrophic genera, but also several genera metabolising C1-compounds (e.g., Methylobacterium spp.), symbionts of plants (e.g., Rhizobium spp.) and animals, and a group of pathogens, the Rickettsiaceae.

  • Reactions of Fused Benzene Rings

    • Compounds in which two or more benzene rings are fused together were described in an earlier section, and they present interesting insights into aromaticity and reactivity.
    • The C1–C2 bond is 1.36 Å long, whereas the C2–C3 bond length is 1.42 Å.
    • Electrophilic substitution reactions take place more rapidly at C1, although the C2 product is more stable and predominates at equilibrium.
    • In the third diagram below, the two naphthenonium intermediates created by attack at C1 and C2 are shown.
    • The structure and chemistry of more highly fused benzene ring compounds, such as anthracene and phenanthrene show many of the same characteristics described above.

  • Combinations of Capacitors: Series and Parallel

    • The circuit shown in (a) contains C1 and C2 in series.
    • If we find the capacitance for the series including C1 and C2, we can treat that total as that from a single capacitor (b).
    • This image depicts capacitors C1, C2, and so on until Cn in parallel.
    • This image depicts capacitors C1, C2 and so on until Cn in a series.

  • The Nonclassical Carbocation Hypothesis

    • The source of this assistance was proposed to be the electron pair of the C1 : C6 sigma bond, which is ideally oriented anti to the sulfonate leaving group.
    • Brown pointed out that the norbornyl compounds are better compared with cyclopentyl than with cyclohexyl analogs (eclipsing strain), and in such a comparison the endo isomer is abnormally slow, the exo isomer being only 14 times faster than cyclopentyl.
    • A similar effect was noted for such substituents at C1 (1R).
    • This influence is best explained by the nonclassical hypothesis, in which partial positive charge must be carried by C1, C2 & C6.

  • The Elements of Ad Hoc Rational Action

    • But the combination of actions A and A3 can be regarded as two components of a single, compound action.
    • C1 is a possible X:

  • Qualitative Spectrum

    • $\displaystyle P = \frac{2}{3} r_0^2 c \beta^2_\perp \gamma^2 B^2 = C_1 \int_0^\infty F\left(\frac{\omega}{\omega_c}\right) d\omega = \omega_c C_1 \int_0^\infty F(x) dx$
    • We would like the function $F(x)$ to be dimensionless which sets the value of $C_1$ up to a dimensionless number.

  • Cervical Plexus

    • The cervical plexus is a plexus of the ventral rami of the first four cervical spinal nerves located from the C1 to C4 cervical segment in the neck.
    • Ansa cervicalis (loop formed from C1–C3), geniohyoid (C1 only), thyrohyoid (C1 only), sternothyroid, sternohyoid, omohyoid: The ansa cervicalis is a loop of nerves that are part of the cervical plexus.

  • Partial Fractions

    • $R(x) = \frac{c_1}{(x - a_1)}+ \frac{c_2}{(x - a_2)}+ \cdots + \frac{c_p}{(x - a_p)}$
    • $g(x)=\frac{8x^2 + 3x - 21}{x^3 - 7x - 6}=\frac{c_1}{(x+2)} + \frac{c_2}{(x-3)}+ \frac{c_3}{(x+1)}$
    • $c_1 = \frac{8x^2 + 3x - 21}{x^3 - 7x - 6} (x+2) = \frac{8x^2 + 3x - 21}{(x-3)(x+1)} $
    • $\begin {aligned} c_1 &= \frac{8(-2)^2 + 3(-2) - 21}{(-2-3)(-2+1)} \\&= \frac {32-27}{(-5)(-1)} \\&=1 \end {aligned}$